EpisodesEpisode 14

Conversation · 14

Rocket Cargo Anywhere In 15 Minutes. The U.S. Air Force Is In. | Matija Milenovic, Hop Aero (YC S26)

1h 7m
Rocket Cargo Anywhere In 15 Minutes. The U.S. Air Force Is In. | Matija Milenovic, Hop Aero (YC S26)

Transcript

In this conversation
Nihal Kurth

It's a great pleasure to have you here today. And I'm so excited to dive deep into what you're building if you just go straight to what you're building and then understand why we need this maybe as a starting point?

Matija Milenovic· Hop Aero

Definitely, yeah. So we're building rockets that deliver cargo to contested environments. so we fly suborbitally point to point at hypersonic speed to very distant locations and we deliver very time sensitive and critical goods.

Nihal Kurth

You mentioned that you had your own experience and also your co-founder had a situation maybe to take a step back and to go back to the origin story. What was the moment, how did your paths cross and then led to build this?

Matija Milenovic· Hop Aero

Yeah, for sure. so my background is in engineering. I I I started my first company that was building satellite propulsion systems and I started that pretty much six months after starting my masters. and so that kind of began as a sort of a series of happy accidents. So we we were trying to get internships, nobody would give us any internships, and so we decided to do this summer project. and through doing that we ended up building a prototype of our

Matija Milenovic· Hop Aero

Propulsion system. It was it was very, very basic. But we realized that in building that that we had a lot of potential to actually turn that into a company. And so we just kept pursuing it. And so that turned into my my first startup that was called Pork Chop Space, where we ended up after about two years launching a propulsion system onto the third ever rideshare mission with SpaceX that was on Transporter 3. And through that company is where I got my experience with raising venture capital and

Matija Milenovic· Hop Aero

building a team, understanding how to do sales and all that kind of stuff. It was it was completely new to me. and so it was it was really, really fun. we ended up selling the IP from that company to another firm. and so I I kind of I I really enjoyed that whole process, but I wanted to, you know, figure out what I wanted to do next. So I spent a year working at a company that was building initially supersonic and hypersonic UAVs. I like for for the last couple of years I've been very interested in high speed flight.

Matija Milenovic· Hop Aero

And so I I really wanted to to get into that space. that company ended up shifting more into defense. So we were supporting the scaling of loitering munition munition production for the Ukrainian armed forces. And

Nihal Kurth

Mm-hmm.

Matija Milenovic· Hop Aero

in supporting that mission, I you know, I was I wasn't I had nothing to do with defense before. I didn't really have any interest in it. And just seeing how you know, in Europe in the twenty first century we had full scale war again, which I kind of

Matija Milenovic· Hop Aero

thought was behind us, I think that was just a regression of of society. I realized that it's gonna be very, very important for people who have the means. so whether that means like built being able to start a company or being able to be an engineer who can build solutions or or whichever way you can contribute should contribute. I think you have a moral responsibility to to defend the the way of life in which you you live. And so I I really enjoyed that mission. But after a year I I realized that I had more gas in the tank and I felt like I just had to do another company

Matija Milenovic· Hop Aero

So I I had that kind of burning, I guess, you know, will to do that again. and so I ended up spending a couple of months just talking to people, trying to figure out what what exactly does that look like. I had a bunch of different ideas. and then I ended up getting introduced to my co-founder through the company that I sold my IP to. So I I I became pretty close with with a lot of that team and after the the deal had kind of closed, one of the guys asked me, So what's what's next for you? And I I sort of

Matija Milenovic· Hop Aero

Told him I have this like idea in the back of my head for rockets and like doing some kind of transportation and stuff, but I'm not sure about it. And he's like, Hey, you gotta talk to this guy. He's he's in California. he's sort of been thinking about some similar things. Just talk to him. And you know, we we we speak. so it was a guy called

Nihal Kurth

Who said that by the way? Who was the first ever?

Matija Milenovic· Hop Aero

Jared. so Jared, when he was at Small Spark, that's the company that we sold our IP to. he is a very good

Nihal Kurth

Hmm.

Matija Milenovic· Hop Aero

friend of my co-founders, of of Jacob's.

Matija Milenovic· Hop Aero

And so I'm very you know, shout out to Jared for putting us in touch. really happy for for that.

Nihal Kurth

Hahaha

Matija Milenovic· Hop Aero

but yeah, we ended up we just like spoke, we spent a lot of time in the beginning talking and not just talking about the like ideas and technical stuff, but also like what our shared values are, understanding what the other person is. if you're if you're to build a successful company, it's a a minimum of like a realistic like 10 year investment of your time, you know, blood, sweat and tears.

Matija Milenovic· Hop Aero

And so you want to make sure that the person you're you're building this with is someone that matches how you operate, what you believe in, what your values are. And we we were aligned really, really well. That was the thing that kind of first jumped out at me. please. Yeah.

Nihal Kurth

I have a question on that.

Nihal Kurth

It's one thing that we have our own images in our heads and then we speak about it. And the other thing is when the situation arises and then you need to stick to your values and the way that you operate. Did you guys give yourselves a little project or a kind of like trial period that let's build something together. It doesn't matter what it is, but let's just go ahead and do it so that we get to know each other more in action.

Matija Milenovic· Hop Aero

Yeah, we we literally did that. So we we decided to put together kind of a a project exactly that to kind of figure out how we work together. can

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

we put together like a prototype and then maybe build a company around us? and so we we did that. We put together a we poured a lot of our like life savings into into this thing. and so the the very first version of it that we built, we go out to the test site, and all of a sudden this jet engine that we had before we were using rockets, it catches fire.

Matija Milenovic· Hop Aero

And so we're both looking at a a decent chunk of our life savings literally on fire. And I remember just like

Nihal Kurth

Yeah

Matija Milenovic· Hop Aero

running up with the fire extinguisher like blasting it out. But for us that was a really good moment because what we realized is neither of us started like blaming each other or shouting at each other, pointing fingers. It was very much like, Okay,

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

let's let's take a step back. There was like maybe, you know, five minutes of silence and then immediately what are we doing next? How are we addressing this? How are we gonna fix this? What's w you know?

Matija Milenovic· Hop Aero

And I remember like looking back and we we tell this story a lot, like that was the the moment that we realized that it's exactly to your point, that it's one thing to say, I have these values or I believe in X, Y, and Z It's another thing to judge someone by their actions and I was at that moment I was like, Okay, I I feel very comfortable going going further into this and like looking back that is probably one of the the main kind of points in our story.

Nihal Kurth

Okay nice nice I don't think it must really hurt when you say the thing didn't work is another disappointment on top your savings are burning together with it like okay gosh

Matija Milenovic· Hop Aero

It sucks because at that point

Matija Milenovic· Hop Aero

we also didn't know if we were gonna, you know, be able to turn that into an actual company, turn it into like raising raising money. So

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

it's it's really, really difficult when you are going through that tunnel of unknown and y you just don't have a light at the end of the tunnel. but that's also where again you look at what people's values are. If if you truly believe in what you're doing and you believe in your co founder, you also have to inherently believe that things will get better over time and and they did, of course. but

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

That's e exactly that. I think that that's definitely something that I recommend to people if you're building a company with someone that you haven't known for a very long time. It's it's a great exercise to just work together and see how it works and maybe it just doesn't work out and it's you guys aren't meant for each other and that's totally fine. but the the upside is effectively uncapped, so you might as well try.

Nihal Kurth

I'm so glad you started with a story that is not just a success and glorious and at the same time it's kind of like showing, okay, we actually started by failing.

Nihal Kurth

But then we failed well, and then we tried to turn things around. And then you also had the same experience. Jacob had it in the military, it's Marine time. And then you had when you were developing hardware that you needed to be there, you needed to make sure the piece arrived there within 24 hours. And instead you grabbed it and then can you walk us through that story? And then the overlapping parts so that everyone who is listening can understand.

Nihal Kurth

okay, this is why this matters. Because I try to explain how did this occur to you, not like just, okay, it's an amazing time now with the things of SpaceX and the developments, but at the same time, why would I ever need this? Like, and we will get to that, but I think you get my point, right? Like the problem space. I'm trying to get us into the problem space.

Matija Milenovic· Hop Aero

For sure. I'll I'll tell Jacob's story. So he he joined the Marines right out of high school. and so I think we're gonna look back in like fifty years and realize that putting eighteen year old boys in in the line of conflict is a very terrible thing that we've been doing and we've been doing it for like centuries and millennia just because we had to, but I think with with the how warfare is becoming autonomous, we're increasingly removing young children and an eighteen year old is still a child, it doesn't matter what the law says.

Matija Milenovic· Hop Aero

Putting children into war is is wrong. And so he was he was in the Marines. he was actually out in Okinawa. and a typhoon, Typhoon Haiyan had swept through the Philippines at the time. and so they were basically tasked with providing as much relief and support and humanitarian aid as they humanly could to the people that were affected. And so one of the main kind of aircraft in the fleet that the Marine Corps have is the MV-22 Osprey, and it's called the Widowmaker because it's

Matija Milenovic· Hop Aero

It's it's known for being very unreliable. but also it it happened that when they were trying to respond, that they had a lot of birds that were downed, they had pilots that were getting fatigued, obviously the weather didn't help. And so they were just not able to, at any given time, there's just so many vehicles that were not operational at that point, also just missing parts, things like that. and so the amount of help that they could provide was limited compared to what they they could have done. And so that's where for Jacob the kind of earliest ideas of

Matija Milenovic· Hop Aero

There has to be a better way of doing something like this started forming in in his head. he went on to work at SpaceX then, literally building reusable rockets and working on the the very first Falcon Heavy, kind of when they Elon's car into space and landed the two boosters at the same time. He launched over twenty Falcon 9s during his time there and Falcon Heavies. and so that's where he really started putting like two and two together in his head.

Matija Milenovic· Hop Aero

And so my my story was obviously like no no lives were lost in in my story. mine mine was more from the commercial angle, which is when I was building my last company, as you mentioned, we we were given very little notice that it was in the middle of COVID and they were like, Hey, we need your propulsion system like tomorrow, basically. otherwise we would have to miss that launch and wait for the the next one. And for context, we were like we were like students

Matija Milenovic· Hop Aero

that were living off of like pot noodle effectively. just like

Matija Milenovic· Hop Aero

you know, being very, I guess, determined to make sure that we we got the propulsion system into into our integrators' hands, we were like, okay, we're we're gonna do whatever it takes. So I I the first c step is obviously you contact FedEx, DHL, UPS, and you try and figure out, you know, can anybody guarantee me like delivery in less than twenty-four hours? I don't care what the money what the cost is, I just need somebody to like give me a guarantee on paper that it'll come. that did not exist. They were willing to charge us

Matija Milenovic· Hop Aero

couple of thousand to ship something like really, really small. but nobody could could guarantee that. So in the I ended up boarding a flight, just transporting

Nihal Kurth

speed.

Matija Milenovic· Hop Aero

it myself. and so that was a twenty-three hour round trip. and I remember on the flights home just being really tired and cranky, I started thinking about, you know, how how else could this be done? Like I started reading, I remember on the flight back, I was reading about Introduction to hypersonic flight. I was reading about some of the

Nihal Kurth

Hahaha

Matija Milenovic· Hop Aero

rocketry work that was done like in the sixties about like

Matija Milenovic· Hop Aero

transportation here on earth. So it was just you know, I w wh whenever I get really pissed off, my first reaction is usually to try and like build a pro b build a solution around that problem. and so that's when I started thinking about it first. And I put that idea in the back of my head. I didn't really think about it for a couple of years. until un one thing that did stick in my head though is that especially when I met Jacob and we started talking, I realized that we had this problem where we needed something delivered

Matija Milenovic· Hop Aero

really, really quickly, and we were a small startup that was willing to pay pretty much whatever it takes. On the complete other end of the spectrum of like sizes of organization is the US military, which also needed things delivered very, very quickly, being willing to spend more or less whatever it takes. And so you're literally encompassing the entire spectrum of all available enterprises, right? and that that was one of the first insights that it was there's there's very likely a lot of

Matija Milenovic· Hop Aero

people and this is like before we spoke to customers before anything like there's very likely a very large subset of people that want to have things delivered in minutes and are willing to spend the money that it takes to do that.

Nihal Kurth

depending on the criticality of the thing, right? Like

Matija Milenovic· Hop Aero

Exactly.

Nihal Kurth

they want the thing at the right time at the right place at whatever cost kinda.

Matija Milenovic· Hop Aero

Exactly. And it's

Matija Milenovic· Hop Aero

it's human nature, right? Like if we we used to take it as as a you know, it it was just like standard practice that going from Europe to the the new world when it was kind of discovered by the not discovered, but when the when the colonials came it took like a couple of weeks and that's just what it took. And then airplanes came along or then steamships came along and they cut that time down and so airplanes cut it down even further and so on and so on. and so it's it's just human nature that once costs become competitive

Matija Milenovic· Hop Aero

You inherently all things being equal, you'll always go for the faster option.

Nihal Kurth

Actually, I, before we spoke today, I was, I was into more the shipments over the ocean, like the vessels and military that they are using. I was so astonished to learn that from in the span of 20 years, if I'm not mistaken, from 6 billion to 12 billion, the amount just doubled of the number of the things that are moving.

Nihal Kurth

through ocean and this is just ocean and on top it's not just a number of things are doubling but at the same time the velocity is also doubling too and then it started to get into the rabbit hole of all this nuclear power you know like enabled the aircrafts on the oceans and then how do they like have this base there but then still run on electricity and then already and then i started to think about what you do guys and then in your situation can you help us understand

Nihal Kurth

how exactly you build it, and maybe like then walk us through the experience, like who decides, let's have our first user in our mind, and then tell us the moment that they make a decision, this needs to be delivered to us within these minutes, and then how do you make it happen, and then what enables this to happen that comes down to the product actually.

Matija Milenovic· Hop Aero

Sure. So there's there's a couple of points that kind of fall into place. So the first one is that if you actually look at who sends things urgently and who needs things urgently, it's usually the same companies. So like it can happen like last minute that a random company needs something, but if you actually look at I'll give you an example of like an automotive plant. Automotive plants generate a lot of cars per hour, so a lot of value per per unit of time. and so

Matija Milenovic· Hop Aero

one hour of downtime can cost them two million dollars. that's like a a very commonly kind of known number. and so that means that on the receiving side, the automotive plant is very likely and very frequently going to be needing last minute things to be delivered. You can have inventory, you can have a lot of things, but you can never fully fix this problem. and so y you look at kind of on the receiving side you're gonna have a lot of companies that are doing this. On the flip side you also have companies that build high critical things or very time sensitive things.

Matija Milenovic· Hop Aero

not related to automotive, for example, is companies doing cold chain logistics. So if you're building drugs or or any sort of things that need to be stored at very low temperatures for for

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

certain amounts of time during transportation, you kind of know that they will be that they will be shipping things out really fre frequently and they just want to get it out to the the end users' hands or the customers' hands very, very quickly. I know these are separate examples but just kind of framing where where the thinking comes from is that the the way that it's done today is that you always have the kind of first smile, last smile in between. So like

Matija Milenovic· Hop Aero

From the automotive plant, there's always gonna be a part that th goes to the nearest airport and then a van will pick it up or a truck and drive it out to the other place. If we can and that that last mile actually accounts for usually a very large, like asymmetrically large percentage of the overall cost of transportation. So

Nihal Kurth

Mm-hmm.

Matija Milenovic· Hop Aero

what that means is if you can cut down the I guess time and the space between the the last mile and the mid mile, if you can effectively eliminate it, that would be a very good thing. Same goes for the first mile. If I'm like

Matija Milenovic· Hop Aero

again shipping out my things, I I will go and hand it over to the courier, they're gonna drive in in a van or a truck to the nearest airport and you know. So if we can do a fully point to point solution, that's kind of the holy grail in what you're doing, that you're going straight from the the sender to the receiver. and so one of the the implications of that is that you can't just have a runway. You can't have like a massive airport and air traffic control and all that kind of stuff. You need something much closer to a helipad. Helipads are obviously like

Matija Milenovic· Hop Aero

much less footprint, smaller footprint you can kind of take off and land vertically. And so we we really looked at the helicopter model for kind of what is the the precedent for what we're trying to build. And so with all of that in mind, the way we look at it is we have our vehicle where the payload bay is on the on the lower part of the vehicle. That's very intentional because we want to be able to come in with existing equipment, so things like forklifts, and other kind of tools

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

and equipment that are available today to actually load

Matija Milenovic· Hop Aero

things onto the the vehicle much faster. be able to take off vertically with our rocket, the same way that every rocket takes off. And then we follow what we call a hop curves, that's why or hop arrow. So we fly this kind of ballistic trajectory. and that's actually the fastest way of going, especially at long distance. It's the fastest way of going anywhere on Earth. faster than any supersonic plane, faster than anything, 'cause you're literally leaving the atmosphere and you're kind of suborbitaling the s kind

Nihal Kurth

suborbital.

Matija Milenovic· Hop Aero

of made up that word,

Matija Milenovic· Hop Aero

But like you're not orbiting the earth, but you're going through a part of it, and then you're re entering. So there's a lot of engineering challenges there. Like there's you know, I could I could like talk about that for

Nihal Kurth

Is it like the Karman

Nihal Kurth

line? Can we call it the Karman line? Like kind of a little bit above the Karman line, right?

Matija Milenovic· Hop Aero

Yeah, so it's it's a function of how far you're traveling. in in some cases you're definitely going past the the Carmen line. the benefit of that is that you don't go through the atmosphere. So when when you're going through the atmosphere, you're just inherently pushing against a lot of air. that becomes more and more difficult the faster you fly. So if there was just no atmosphere, your problem is not solved, but y you definitely can can design your mission in a different way. So we we fly in that kind of curve.

Matija Milenovic· Hop Aero

And then when we're about to re-enter the atmosphere, we we we come in pretty hot. So like the the entire vehicle needs to survive the re-entry into the atmosphere. and then at the final part you decelerate enough. So it's very similar to how SpaceX lands their rockets. You you come in, you decelerate your yourself to be very, very slow, deploy your legs, and then you can land vertically. and so there's a bunch of engineering challenges there, of course.

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

but we're using technologies that are all very mature and have all been tested.

Matija Milenovic· Hop Aero

so it's not like we're trying to we're trying to build a new form of propulsion system or very exotic thermal materials or anything like that. We're using things that very much exist today and are just applying it to a problem where we're not trying to put more satellites into space, we're putting more cargo to different places on on the planet.

Nihal Kurth

there are two scenarios. One is a commercial one. The other is the military, right? And for the commercial one, you still need to little bit of a kind of set up, I guess, or at least to tell people where is it going to go from and where is it going to land. the military one is the most interesting one because it could be anywhere.

Nihal Kurth

and especially GPS disabled places, those like the very, very tough environments. let's take a look at the situation where you send it in the military scenario.

Nihal Kurth

And in the middle of nowhere, like how do you even know where to pick? And then how do you know that where you're gonna land? And when you land, like what are the things that needs to be checked, checked, checked? Because it's an autonomous rocket, right? Like it's not like someone is like driving, yeah? And then what's the system behind it? If you just break it down the system for us, that will be super cool.

Matija Milenovic· Hop Aero

Yeah, so kind of we I'll I'll stick to the things that we've publicly disclosed. So we we

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

launch from a forty foot shipping container. And so the idea is because our rockets are relatively small, that like Rook Two that we're building, that's kind of our our gonna be our first product, we can preposition that container that has the launch system inside of it. and so that pretty much means wherever you can whatever flat surface you can put a forty foot shipping container on, which is extremely common, you can launch a rocket from.

Matija Milenovic· Hop Aero

And so from from a military perspective, the huge benefit to that is that you have very responsive launch. It means that you're you don't need a massive launch site, you don't need, you know, fixed infrastructure. The idea is to be very mobile in the military. There's a

Nihal Kurth

Bye.

Matija Milenovic· Hop Aero

a saying called shoot and scoot effectively. that's really kind of what we're trying to go for on on the launch side. same goes for the landing.

Nihal Kurth

So as long as you have space

Nihal Kurth

for the container, it's like basic container. What size of container we are talking about?

Matija Milenovic· Hop Aero

So it's forty foot long, I think that works out to I can't remember. I think it's twelve meters long.

Nihal Kurth

Okay.

Matija Milenovic· Hop Aero

something like that. so it's it's the most standard size of shipping container. It's like forty foot long and then ten foot by ten foot on on the front. and then we we launch, as I mentioned, kind of vertically, we follow our hop. and then what we also kind of announced publicly is that we land on on unprepared surfaces.

Matija Milenovic· Hop Aero

again this is something that's been done for a really long time. People kind of forget. Like the the original landing on an unprepared surface is literally on the moon. you you know, it's like the the most unprepared that it can be. Obviously the moon doesn't have an atmosphere, but SpaceX has also been landing on prepared surfaces here on Earth. But if you look at companies like Mastin Space, my co-founder used to work at Mastin. they were landing on on sand, they were landing on some pretty pretty rough surfaces, so it's definitely

Matija Milenovic· Hop Aero

You know, again, I I I'll keep saying this, like there's a lot of engineering challenges that go into this, but it's very much possible.

Nihal Kurth

But actually, in this situation, what are the things that the system looks into before making the decision? Okay, this is good enough for me to land here.

Matija Milenovic· Hop Aero

So there's been a lot of I won't go into like exact details of of our kind of flight controls and things like that, but one thing I will say is that

Nihal Kurth

Hmm.

Matija Milenovic· Hop Aero

the the war in Ukraine has significantly improved the quality of avionic sensors as and autonomy as well. and also not not just improved them but also significantly cut down the cost and increased their availability. So before the Ukraine war, for example, a an anti jamming GPS antenna would have been

Matija Milenovic· Hop Aero

Very, very difficult to to get your hands on.

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

it would have cost a lot of money and been a very long lead time to get it as well. And now there's probably like two dozen companies that are building them really, really well. same goes for cameras that are able to do onboard vision processing to you know what whether you're like looking for a target or whether you're trying land somewhere. so we've definitely been tracking a lot of the latest developments and what's been going on in the kind of drone wars and

Matija Milenovic· Hop Aero

A lot of it is actually relatively applicable to to rocketry. There's certain things that obviously you need to take from like how things were done before. but again, that's where SpaceX did a phenomenal job in kind of not buying

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

from legacy primes and they just built a lot of things themselves. and especially now with AI and how much you can amplify the capabilities of of engineers. we we can move a lot faster with with a much smaller team that's able to build

Matija Milenovic· Hop Aero

hardware at the same quality, rate and and capacity as as was done by by much larger teams in the past.

Nihal Kurth

Speaking of AI that you mentioned, I assume you leverage it in your designs as well, but at the same time...

Nihal Kurth

I am aware that I can't ask so many detailed questions. the end, this is your calligraphy resource too. But when it comes to manufacturing and when AI designs things, the geometry is very different. the way that we manufacture, it could be additive manufacturing or it could be subtractive manufacturing. And how do you guys leverage these both options when it comes to manufacturing and the

Nihal Kurth

part and it's itself also you have simulations versus reality test that maybe then you can literally like help us understand that piece that will be great.

Matija Milenovic· Hop Aero

Sure.

Matija Milenovic· Hop Aero

so yeah, bunch of different bunch of different questions there. the the I'll start off with engines. So engines for the last I'd say ten, fifteen years for rockets have pretty much been 3D printed. especially the kind of combustion chambers and and things like that, the the kind of cooling channels. just because it's so much easier to do,

Matija Milenovic· Hop Aero

And and a lot of that was kind of because like digital manufacturing kind of became more commonplace in the last twenty to twenty-five years. And so even people don't realize people people don't get cr SpaceX enough credit. They they've been using Metal 3D printed engines for a while. Rocket Lab were kind of the first,

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

I guess, really well known known ones for this. but now it's kind of the the industry default. I find very, very few teams are using any sort of subtractive manufacturing for for things like that. so the really cool thing about where we are right now is that

Matija Milenovic· Hop Aero

If you have a digital design process and additive manufacturing is a digital manufacturing process because it's effectively fully defined that way, you can have a very you're a lot closer to a fully closed loop where you actually have so the end goal here is like to have basically zero humans involved. You want to achieve a certain goal, you you need to understand the physics and and modeling the physics of an engine is, you know, a lot of things. You have thermal stress, you have mechanical considerations, metal, thermochemistry, all that kind of stuff.

Matija Milenovic· Hop Aero

But ultimately it's it's it's very much a science, not an art in some ways. there's definitely like creative solutions that you can think of, but like building an engine is a very well known and understood thing, kind of traditional engines. And so without going into too much detail, we're we've been building what we call Hop OS internally, which is our intelligence layer of the company. And the end goal for Hop OS is that we will always need humans to to solve a lot of problems and guide things, but

Matija Milenovic· Hop Aero

It's how do you facilitate at scale of the size of a large engineering organization the means for things like that engine to be fully defined in software, ideally tested tested and simulated in software, but also have a really good feedback loop from when you're testing it in real life,

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

feeding that data that you gather back into the model and making sure that all of those lessons are learned. Traditionally that would have been a really, really long process. You'd have separate teams and just a lot of human error and miscommunication, it just takes a long time. So

Matija Milenovic· Hop Aero

These are all things that, you know, we obviously didn't invent 3D printing or anything, but we we stand on the shoulders of giants and we've been really smart about how we leverage a lot of these things, especially

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

going forward, trying to forecast what what are the capabilities of AR gonna look like in in six months, twelve months, you know, more, and trying to build Hop OS and the tools within Hop OS around that capability. So we're we're really, really excited about that. Actually, it's it's it's one of the coolest things about

Matija Milenovic· Hop Aero

being being alive and being a building a company this time.

Nihal Kurth

Actually then, in a way, you guys become the glue of the best practice. I don't like the word best practices, but the best way of doing things. So individually then you try to connect it in your operating system and then try to run it in a more effective and efficient way, if I understood correctly.

Matija Milenovic· Hop Aero

Yeah, so one of the that was one thing that I I learned from Jacob from when when he was at SpaceX is that one of the reasons SpaceX was so successful is because they had really powerful enterprise software tools that they developed and maintained themselves. so warp drive is the one that a lot of people know about. And that's obviously, you know, like warp drive. Sorry?

Nihal Kurth

Word drive? What is it about? I haven't heard about it. What is it about? I haven't

Nihal Kurth

heard about it.

Matija Milenovic· Hop Aero

So basically Warp Drive is one of several softwares that S SpaceX built and used to effectively streamline a lot of their internal production. And I think it's like closer to kind of ERP. with Hop OS, our

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

vision is a little bit different to that. but essentially what we saw is that that was obviously like you know, one of the reasons again Elon Musk was so successful with SpaceX is because he came from the software world and he brought a lot of those ideas into into aerospace. We're at a very similar position today where

Matija Milenovic· Hop Aero

The adoption of AI in aerospace is actually surprisingly low. considering we've had like very advanced AI for the last couple of years. There's definitely some companies

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

that are, you know, pushing pushing the edge of AI in in aerospace. but if you actually look at the average aerospace engineering organization, the the level of adoption of AI is is relatively glacial. And so we see this really, really great opportunity right now where we can come in and and and shove a wedge into that and make sure that we can outpace other companies.

Nihal Kurth

Actually, of the things that I realized, correct me if I'm wrong, the folks who have the hands-on experience in aerospace and they realize the way that we are surfing right now in AI, they started to get super specialized in a way that they built, for example, I forgot the name, there is an amazing software company. helped.

Nihal Kurth

the engineers to design their engine, but they don't do anything. But this is like purely with the AI inside of it, leveraging it. at the same time, the only algorithm that they provide them to make their life in their context better, then it kind of started to surprise me to see it started to get even those branches all around when it comes to testing. There's a totally

Nihal Kurth

specialized one when it comes to designing the algorithm and software is totally specialized. In your situation, what sort of things you guys are outsourcing in a way that you collaborate partner and what sort of things that you say, no, no, no, we handle this on our own. This is our whole house in-house.

Matija Milenovic· Hop Aero

that's a really good question. That's one that we have spent a lot of time thinking about. So the way that it currently works right now is effectively we don't have a blanket policy. So we don't say we're fully vertically integrated or we're just partnering with everyone and not building anything and we'll we'll integrate everything at the end. we look at it very much from a you know, I it's it's it's such an overused phrase, but like first principles, which what makes ultimately more sense and how do you like work up from that?

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

and so we'll look at component by component.

Matija Milenovic· Hop Aero

For example, certain valves, you can just find them off the shelf and they'll they'll do a great job. Other types of valves, you cannot do that, and so you might just have to build that yourself. and so we have no blanket policy, but we we look at everything from we we make make or buy decisions like standard engineering companies. So how much would this cost us to to make? If we don't make it, what's the cost, lead time? how reliable is the supplier? even if if suppliers check all the boxes and they can promise you

Matija Milenovic· Hop Aero

Very attractive prices, amazing lead time, all that kind of stuff. We've had so many cases where they just disappoint and they they deliver you know, twenty percent delayed,

Nihal Kurth

delays.

Matija Milenovic· Hop Aero

over over budget, things like that. And so we've been bitten a couple of times before by by depending on suppliers. So I think given AI, given, you know, a bunch of different things, given the fact that there's also a lot of vertical integration that's been done in aerospace in the last kind of ten, fifteen years, I think that's where things are trending to in the long term.

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

However, very importantly, we know that we cannot do everything in house. It's just physically impossible if you want to run a tight team and there's just some things that that take time to to develop and build. And so that's that's one thing that we've we've definitely tried to be really smart about. We're not trying to say that we're one way or the other. We try to just be very intentional about every single part and component.

Nihal Kurth

Yeah, also probably that you always play to your strength, right? Because you don't have time to... Like how many of those things you can really learn and try to get done Did you ever have a situation where you yourself were surprised with your learning speeds? Like, guys, like we had to figure this out on our own because as you say, let's say supplier was not reliable. And then you were like, okay.

Nihal Kurth

Time is ticking, so let's just give it a try. Do you have a situation like that? Probably you do, did, but maybe if you tell one.

Matija Milenovic· Hop Aero

We have a lot. We have a lot. I

Matija Milenovic· Hop Aero

we we have a lot. There's there's I'm trying to think of one that I can say publicly. because like it's it's also like I understand when you're working with another company, they have their own, you know, priorities and goals and things like that. for example, one good one is like with valves. As I kinda mentioned, we we were buying valves off the shelf.

Matija Milenovic· Hop Aero

And you know, we we had it like in the invoice that it was gonna be this cost, this lead time, whatever. they became they w they were very late, they came like maybe a quarter of them were broken, things like that. So that just like it was just really unfortunate 'cause we were in huge crunch time and and just had to go and as quickly as

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

humanly possible to try and find alternatives. I won't name the company, but things like that just happen and especially as a company is larger.

Matija Milenovic· Hop Aero

they care a lot less about you as a startup and that's that's the other thing as well. You could think that what you're building is the most important thing in the world, but you also have to be very realistic and realize exactly, exactly,

Nihal Kurth

For you, not for them.

Matija Milenovic· Hop Aero

exactly. So like just you know putting putting you know any sort of like ego that you might have aside and understanding where do I fit in the food chain for these guys. that alone could just save you so much time and money. and

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

just speaking with other founders as well, everyone seems to learn that lesson the hard way as well. That like for for certain components

Matija Milenovic· Hop Aero

even if it's initially cheaper to buy it off the shelf, it can it can mess you up in the long term just b by not having that learning and that knowledge. And we've had a bunch of insights that kind of come through, like to your point, that just by actually building it, we realized that the process by which we built it was maybe not great and that AI could automate a bunch of these things. so especially actually in software I was I can't remember who I was talking about it with recently.

Matija Milenovic· Hop Aero

but I think when it comes to SaaS products, like a lot of companies are finding it better to just build their own tools. because not not in every single case, but it's usually like you can solve I'd say ninety percent of your problems by building building it yourself when it comes to software.

Nihal Kurth

Honestly, I really appreciate your blunt and honest way of explaining this

Nihal Kurth

We all know as a reality that if you go to a big company that you need to collaborate with them. And the very first thing happens is like, what sort of revenue do you provide them on the rankings? Where do you stand? Like to be very like brutally honest with you. And most of the times whenever I ask founders like, you know, conversations, so how do you make sure that you're going to be one of the people who is going to receive on time? And we know this, we have this, we have that. But I'd like, you're one of the very few like say,

Nihal Kurth

in a very honest way. Yeah, that actually happens too. And then we just need to find a way to turn things around and either build ourselves or then we try to buy time in the mean time. Thank you. That was really refreshing.

Matija Milenovic· Hop Aero

We're we're

Matija Milenovic· Hop Aero

we're very open about like our our successes and our failures. I mean to the point about that jet engine, you know, being on fire at the at the start of the of the podcast. we you know, y you just you cannot build a company like this without making a huge number of mistakes along the way. And the only thing you can do is just make sure that you learn from them and incorporate those learnings and that it also goes into the culture of the company. And so

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

whenever I fail at things or the rest of the team fails at things, like it's never again, we have we don't have this finger pointing exercise, it's

Matija Milenovic· Hop Aero

Okay, what's next? How do we how do we fix this? How do we move forward? so same goes for suppliers. It's not I I don't think that suppliers are evil or anything like that. It's just you have to be very

Nihal Kurth

No.

Matija Milenovic· Hop Aero

real about the situation.

Nihal Kurth

It's you know sometimes they say it's just business. There's this cult

Matija Milenovic· Hop Aero

Yeah, yeah.

Nihal Kurth

saying it's just business don't take it personal.

Matija Milenovic· Hop Aero

Yeah.

Nihal Kurth

like Mati I am having multiple questions but probably I'm gonna take a little bit step back to the differentiation of your product because

Nihal Kurth

If you take a look at all the alternative solutions right now out there, there are multi-copters, there are drones, there are K-Max aircrafts, and they are like, you know them better than I do. And then the range is very like from 60, I think minimum is 68 kilos to...

Nihal Kurth

almost three tons and depending on the solution the range and the time you aim for you guys seem to be the fastest by all means but at the same time why would that would stop me let's say i have a solution where i can send two tons of supply in the military conditions to the most help needed area and if they just wait another 30 minutes or another

Nihal Kurth

45 minutes, they're gonna get even more supply versus I need to get your solution which kind of sets into my mind. Is it an outlier situation? Is it so exceptional that you know because things need to be I know there is no value we can give for a human being's lives on if it is

Nihal Kurth

in war situations especially. But can you help us understand, are we talking about the really infrastructure that's gonna speed things up or are we talking about such extremely rare situations but still critical and no matter what military is gonna cover the thing? Like I'm trying to understand how do you guys want to make it sustainable not like one at a, don't know what occasion.

Matija Milenovic· Hop Aero

Sure.

Nihal Kurth

Do you know what I mean? Could I explain myself?

Matija Milenovic· Hop Aero

Totally.

Matija Milenovic· Hop Aero

Yeah, for sure. so that was that was a multi loaded question. Let me kinda break that down. So drones and like quadcopters and and all of these things are are phenomenal. I think it's like we're gonna look back in a hundred years and realize that drones becoming a commonplace thing has been a huge invention for society. but to your point, they are generally very limited in range and speed. So the again huge spectrum but like

Matija Milenovic· Hop Aero

Very like the fastest drones like interceptors are reaching three, four hundred kilometers an hour. that's kind of outliers. Most are kind of going

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

less than a hundred kilometers an hour. and then again payload capacity, you're looking at several kilos or pounds. Sure. Just fact

Nihal Kurth

I'm checking my table. I have a kind of table here.

Matija Milenovic· Hop Aero

check me all day. That's that's totally fine. so like these these things are great. The we're we're like a lot of the benefit of these is it's basically within a city. So that's it's it's like the perfect solution for cities and it's it's

Matija Milenovic· Hop Aero

Disappointed that we don't have more drone delivery in the world, but they're vertically takeoff and landing. They have relatively limited payload capacity, which is perfect for like safety. So if a drone drone falls out of the sky, the damage it can cause by carrying a pizza and a coffee is very, very limited. and it's it's vertically landing as well. when when you're looking at a wartime scenario, one of the biggest things that you're looking at is actually the the speed and the range. So at that point you're not going you're not transporting something

Matija Milenovic· Hop Aero

you know, like a couple of miles, you're in in a lot of cases looking to go tens of miles, hundreds of miles potentially. And so you

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

kinda have to fall back on what what is already exists today. Like you cannot send a a cargo drone to deliver things hundreds of miles away because it just doesn't exist. Battery density isn't good enough. If you're using one with s with like a generator, like a hybrid system, it's kind of a mixed bag. and then again you have the landing problem. Usually vertical takeoff and landing drones have very limited range because you spend a lot of energy

Matija Milenovic· Hop Aero

going up and a lot of energy going down, whereas ones

Nihal Kurth

No. Up. No.

Matija Milenovic· Hop Aero

the crews are a lot more efficient but g you know you need a runway. with rocketry, you still have the same physics problem, so you still spend a lot of energy going up, you spend a lot of energy going down, but you do not need a runway, which is one of the main things in in wartime. So the I

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

guess one way to think about us is we're kind of like a quadcopter on on steroids that's able to go much faster and further.

Matija Milenovic· Hop Aero

And then the other one is speed, and that's kinda the main one, which is that a quadcopter, as I said, can go relatively slowly in most cases, or multicopter. and that's relatively easy to shoot down. Like you you can see like a million clips on YouTube of just shoulder sold soldiers shooting

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

these down with with AK forty sevens. with rocketry, you can you kind of get the best of both worlds. So you're able to go very, very far distances, you know, on the order of hundreds of miles, and you're able to do that in minutes.

Matija Milenovic· Hop Aero

And so from from the wartime perspective, you're giving people a brand new instrument through which to deploy cargo. now to your point about like the the actual like use cases and whether this is like an urgent thing or like whether it could be used at scale, this is where it comes back to what I said before about how how low cost can we make these things? If we're charging, you know, ten million dollars per launch, nobody will ever buy from us because it's just astronomical amounts of money.

Matija Milenovic· Hop Aero

I won't go into the details of how much we're we're charging, but it's substantially less than ten million dollars. and also we we see a very clear path to cutting down the cost in in a bunch of different ways. again won't go into the details of that, but our our goal is to actually com have a comparable cost per unit of mass or per unit of whatever compared to a lot of different solutions.

Matija Milenovic· Hop Aero

Such that, as I said at the beginning, if all things are equal and you just want to choose the faster one, you will always choose the faster one compared to the slower one because why would you? And as

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

I also said before, there's a lot of engineering challenges that need to go into this. So the upfront development and the upfront capex to build something like this is obviously higher than a a drone or a quadcopter, but the the payoff is also much, much higher. The upside is much higher. and so as a capability, you you know, I I think it's inevitable that every superpower will want this, will need this.

Matija Milenovic· Hop Aero

and then it's like who's gonna be there who's gonna be the first one to get it? so that's kinda how we how we think about that. And then if I remember the the last question that you had was what's stopping you know someone else from just building this thing because it's you know I can't remember how you phrased it but like wh why why can someone else not do this? I could come here and talk about like we have this amazing like we have Hop OS and we have this and this and this,

Nihal Kurth

you

Matija Milenovic· Hop Aero

we have like this this different approach, but a lot of it is like can you build a really good team

Matija Milenovic· Hop Aero

to to go out and actually design this? Do you have the team that has the grit to be out for, you know, eighteen hour days and test it on the site? Do you know how to operate a test site? Do you know how to you know gather that data from the test team and then feed that back into the design team very quickly? Can you make sure that the test and design team are the same team? You know, can can software accelerate any of that? So like the

Nihal Kurth

Yeah, yeah,

Matija Milenovic· Hop Aero

the I saw this tweet on X really recently that said like the like being able to endure pain is the moat, something like that. And that's

Matija Milenovic· Hop Aero

I think ultimately what it boils down to is is something like that. Like you can be the smartest guy and for sure like being smart here helps. but a lot of it is just

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

can you and your founders and your team be able to get kicked in the teeth every single day for years and just persevere through? I think that's ultimately one of the differentiators and I I I would be willing to bet everything I have that there's not many people like that.

Nihal Kurth

I this is like, I sometimes make it, how do say this, analogy between relationships. You know that you start dating with someone, you start flirting and then you phase into dating. And then in the beginning, everything's always great. Like chemistry is always there. Like everyone is at their best, let's say behavior. But then the moment that the life throws a couple of things and then you get this realized.

Nihal Kurth

hold on. no, no, no, I don't want no, can't can't help you with this. And then I thought we would be a couple who is going to go through this together. That's also probably I am now. I never said like they should be always two founders or co-founders needs to be in place. But honestly, I think it's a massive help. Like even if even if it is not about pure technical and execution perspective,

Nihal Kurth

First you have a sparring partner and the most important part you're a human being in the end of the day like you also have your own batteries that somebody needs to be covering for you or Saying hey, it's all right. Like just go sleep tomorrow is a new day. Did you guys when was the last? Situation like this that Jacob or you are like, that's fine. Let's close the shop today Take a sleep tomorrow's a new day

Matija Milenovic· Hop Aero

A lot. I'm I'm a human. I don't know if Jacob's a human. I've seen him like do some crazy, crazy work for for very long hours. I think like half of his brain is probably some sort of AI, something like that. he's he's a machine. he gets a lot of that from being in the Marines. they they

Nihal Kurth

Bye.

Matija Milenovic· Hop Aero

you know that's that's also why in general I love working with veterans because they're just talking to veterans as well. They tend to be some of the the hardest working people that you'll meet out there. we we have a lot of those times. So like that's exactly to your point. Like I think

Matija Milenovic· Hop Aero

We we've spoken about that. I think one one founder of a company and you have nobody to kind of lean on when times are tough, if you have three founders in a company, the keeping like three people in you know, three is a crowd, as they say. It's not, you know, two is a pair, three is a crowd. I think having having like that level of communication with three founders is actually difficult and the number of relationships that you have to manage with like co-founders increases, I think, proportional to the square of the number of people. So it's just like

Nihal Kurth

Decision

Nihal Kurth

making also gets trickier, right?

Matija Milenovic· Hop Aero

Exactly.

Matija Milenovic· Hop Aero

and so the the cool thing about our setup is that obviously I'm technical but I'm I'm the CEO, so I'm responsible for pretty much everything non technical. I get the final say on all of these things. For Jacob he's the CTO, he gets the final say on all technical things. However, him being a veteran and having experience with the military gives me a lot of insight into what I'm doing and he can also kind of be a sparring partner. And same for me, I'm able to to help out a lot on engineering and kind of, you know, be a fresh pair of eyes in in certain cases. So

Matija Milenovic· Hop Aero

That's also what I I love about our setup is that we're not you know, I'm not like some some business guy that just kind of said, Yeah, you know, let's do whatever and make the rocket go faster. It doesn't matter how, just make it faster. Like having and and same for him, if he was like just go Yeah

Nihal Kurth

you do understand what it is okay it's not that you do understand

Nihal Kurth

what it takes to be a dead that's why like you can't just say i don't care now by noon i want this done

Matija Milenovic· Hop Aero

Exactly. Ex and same for him. He can't just like he understands how government contracting works. You know that it's not just like well it's it's one PM already, why don't we have a new contract? So it's like that mutual understanding is has been a very important thing for for us. and it also carries down to the team as well. Like we are you know, obviously we're a very technical company and we make sure that the people we bring on are technically very, very good. so that's been that's been a very important kind of part of what we do.

Nihal Kurth

I remember in the family, we used to say a lot, soldier mode, when anything, let's say, you're not in your mood or you're sick, but there's something super important that you need to deliver. That's why it comes from, I think this discipline with the military background people is a different level that I can confirm from my own experience. No, no, no, no, soldier mode, you push through. And actually you feel very proud afterwards. I didn't know I had that energy already.

Nihal Kurth

Really cool to have such a mindset in place in where you're building. Speaking of the faster, because faster rocket means, okay, velocity is higher, but then immediately that drinks up the fuel.

Nihal Kurth

Can maybe little bit tell us how you fine tune those balances? Because sky is the limit when it comes to setting higher targets. you also mentioned, also guys publicly said that you completed your tethered testings, there was sort of things came to your mind that.

Nihal Kurth

those were the trade-offs versus perhaps speed or perhaps how much load I can bring in.

Matija Milenovic· Hop Aero

Yeah, so we very much optimized for what we call door to door speed. So

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

if you think about like this is when the the user wants to send something and this is when the other user wants to receive it. the flight is actually a relatively small piece of that entire puzzle. so what the military has saying, for example, everything to the left of launch, meaning how do you get the the cargo that you need to be into the rocket in the first place? Like is it already in the rocket? Is it at the same kind of storage facility, the warehouse? Is it

Matija Milenovic· Hop Aero

somewhere else. So how how do you figure all of that stuff out? and there's

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

there's a lot of work and there's a lot of really smart people in the in the DOW looking at that. And then same as when you land, if you don't land right where the the end user is, the recipient is, how do you then get it to them? And that's a lot of what we're focusing on is how do we make sure again with like landing vertically, can we get as close as humanly possible to them? So that that's like this kind of door to door metric is the the the kind of main KPI that of Hoparrow if you want to look at it that way.

Matija Milenovic· Hop Aero

the

Nihal Kurth

Okay.

Matija Milenovic· Hop Aero

the speed of the rocket is like governed by orbital mechanics. So when when you fly suborbital, it is governed by just you know, Newtonian physics, it's just known that like this is how long it's gonna take, and then you have some like extra time from drag and and so on. when you look at other companies in in the space, they do like they do fly fast in the sense of like I'll give like a really common example. there's a bunch of companies that the idea is to store

Matija Milenovic· Hop Aero

cargo in satellites that are going in orbit for weeks or months, and then whenever somebody needs it, they they re-enter into the Earth's atmosphere. the biggest problem there is that the door to door s time there is actually months. So you need to know well in advance what you're gonna put into space. You need to go launch on on another rocket, so usually 99% of the time it's SpaceX. SpaceX are cutting down commercial launches from other companies, so Falcon 9 is being phased out from 2028.

Matija Milenovic· Hop Aero

You're gonna be stuck with Starship. Starship is very, very busy deploying Starlink and orbital data centers. So you're like people don't really realize how depending on another company is a massive bottleneck. and then you're also putting things into orbit that were

Nihal Kurth

And also like this

Nihal Kurth

is like just a small question between it takes like up to six months, right? If I say I wanna make, let's say just a reservation, it's not like, yeah, next week we have a slot or I can fly you. It's like months, right? Like months time that you need to wait.

Matija Milenovic· Hop Aero

That's kind of the point I was gonna make is that you're putting things into space that are not really designed to be in space. So a good example is for example things that have lubricants inside. space is a vacuum environment and it is a radiation environment as well. Things like lubricants were not designed to be there, so they can boil off over time, they can get degraded. So a very complex

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

piece of hardware that was never meant to be in space can suddenly become useless if it spends a a long amount of time in space.

Matija Milenovic· Hop Aero

Again, you can do some things, you can pressurize it, you can have some like radiation shielding or whatever. but you're still bottlenecked by how quickly you can launch. You also need to qualify that entire system to make sure that it's launchable. So like you still need to show SpaceX proof that, hey, this thing that I want to launch with you is is is okay and safe to launch because you have other other things in the rocket. and so all of that takes a lot of time. ultimately you're looking at like a long time, like you're measuring it in months, going from like putting

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

something into space

Matija Milenovic· Hop Aero

And not only that, but then when you're in space, you have to have these things in multiple different orbits so that because you don't know if someone's gonna need the cargo near the equator or near the north north pole. And so you need to make sure that your satellite is in the right place, the right time. The only solution to that is that you have like a bunch of them, so like dozens of satellites. Our solution was like, let's just yeet it somewhere, just put the thing into the vehicle. We have to obvious I have to pre qualify it as well. We need to make sure that it's gonna be okay. But because we spend a very short amount of time going through space, it's measured in minutes, not

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

in months or weeks.

Matija Milenovic· Hop Aero

and so it's it's inherently the fastest way of of getting things to to other places. We've spoken to people in the Air Force and Space Force and it's when when they compare our solution to to others, they're like we have not seen how these orbital sat cargo satellites are able to actually solve our problems. They're they're a cool concept, but I don't think it actually solves the the problem that the end user is is trying to get solved and that the customer is willing to pay for.

Nihal Kurth

Actually, Then speaking of Air Force, you guys had a major accomplishment, congratulations. What would that mean? Would that mean the contracts? Because it might mean many things, right? It might be already a small step of prototyping or testing.

Nihal Kurth

Where do you stand today with AI Force? How is your collaboration with them?

Matija Milenovic· Hop Aero

I won't go into too much detail. We're what I will say is that we're actively delivering on a contract with Air Force Research Labs. we're about I'd say three quarters of the way through. I don't know off the top of my head. what's really exciting is that we've built that relationships not just within the Air Force but also a lot of the other the the branches and other teams within the DOW. and so

Nihal Kurth

Mm-hmm.

Matija Milenovic· Hop Aero

just being able to to continue developing our idea.

Matija Milenovic· Hop Aero

based on what we hear from conversations is is immensely helpful. we also have a pretty cool pipeline of of other I'll say contracts and and projects that we we're looking at and and will be converting. so it's we're we're we're just getting started. we're really excited about kind of our our progress there.

Nihal Kurth

How do you think about scaling the production? I know it's very early days, but I also assume you have some sort of roadmap in your head with Jacob. what do you guys envision moving forward? what are the milestones that you are looking forward to? Check, check, check.

Matija Milenovic· Hop Aero

So the biggest milestone is gonna be actually like building the product itself, like getting it to a point where it works and we can we can sell it. so we're gonna be kind of in build mode, focusing on that for for the next while. Once we get there, so this is where Jacob's experience very much comes into play. he especially in the kind of the Falcon Booster Reefer program, he was one of the core people of that team and so

Matija Milenovic· Hop Aero

He has a lot of really, really cool and smart insights into how to actually cut down the time between reuses and how to refurbish these vehicles. What are some things that SpaceX did well that didn't that they didn't do so well?

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

and so we have we have some aces up our sleeve there. that being said, it's just like it's you're you're building hardware at scale. Obviously to get started, you're gonna need a bunch of CapEx. and so we

Matija Milenovic· Hop Aero

We've been looking at kind of being smart about where we want to do that. We have obviously we're headquartered in California, but we have a a pretty nice and and big test site out in Oklahoma at the spaceport. and it's been amazing just doing a lot of our kind of testing, putting things together at Oklahoma. We're able to iterate really, really quickly

Nihal Kurth

Mm-hmm.

Matija Milenovic· Hop Aero

over there. and so we're we're really trying to be strategic in the long run about what operations of the company do we do where.

Matija Milenovic· Hop Aero

I think SpaceX have actually done a tremendous job kind of breaking it down between Hawthorne and then it kind of now moving more towards Boca Chica and initially McGregor for their engine testing. So thankfully there's a lot to be learned from again, we stand on the shoulders of giants. We we can definitely see what

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

things did they do well and what what are things that we can improve on.

Nihal Kurth

Actually, my understanding is that you don't target to be reusable immediately from the get go, right? Like it's like a breakdown. And as one of the first milestones to that is like, you just want to make sure that this goes and afterwards in the next phase that you will be looking to that or.

Matija Milenovic· Hop Aero

I yeah, I won't go into detail on that one, but it's like reusability

Nihal Kurth

Okay.

Matija Milenovic· Hop Aero

is definitely reusability is definitely like one of the the goals we have for the immediate future.

Nihal Kurth

Okay, okay. And in the very early days, whatever you build and you test, isn't it much more ideal to be in one place? I was wondering when I saw the map and then where you yellow box the locations, why wouldn't you guys stay all together in one place?

Matija Milenovic· Hop Aero

so the biggest reason is that it's like engines are very loud and they can like obviously there's a lot of risks of like explosions and things like that. So you need to be in a place where it's a controlled environment and it's safe and you don't have a lot of kind of population centers nearby that could potentially obviously like we don't want to disturb them, but we also want to make sure that we're in a place where they're not gonna disturb us by complaining about noise and things like that. So the only neighbors that we have to worry about right now is a ranch of cows. It's next next to our our telescite and they're, you know, really cute black cows.

Matija Milenovic· Hop Aero

and so that was the like we we've been in Oklahoma at the spaceport there since I think November, December of last year. so in parallel to building our rocket, we've also been building out the the the kind of infrastructure at the spaceport there at our test site. and

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

so we were we picked Oklahoma because it's a it's a phenomenal state. Firstly I feel like it's it's my second home at this point. I I go there a lot, my co founder goes there even more. but we we were able to get a lot of support from from people there at on day one.

Matija Milenovic· Hop Aero

we looked at a bunch of other states. We didn't feel that same level of interest from them. We didn't feel the same level of opportunities that they could provide us compared to Oklahoma. and even exactly it's just,

Nihal Kurth

Okay, environment comes down to us.

Matija Milenovic· Hop Aero

you know, and there there's more aerospace companies coming to Oklahoma as well, which is which is really, really cool. It's obviously for us it's kind of a validation for our decision, but it's also for them. It shows that the work that they've been putting in is is starting to pay off.

Matija Milenovic· Hop Aero

and so for us it's it's been a kind of a no brainer opening that facility there in the future. the problem with like testing in California is most aerospace companies are in the kind of wider LA area, so kind of LA County or or Orange County. and so the closest place to test is the Mojave spaceport. The the problem with Mojave is that it's very, very busy and so just getting getting space there, getting

Nihal Kurth

Okay.

Matija Milenovic· Hop Aero

like tests scheduled is it's it's just a lot trickier, so yeah.

Nihal Kurth

So, okay, more like a pragmatic reasons, got it, yeah.

Matija Milenovic· Hop Aero

Yeah.

Nihal Kurth

Okay,

Nihal Kurth

How would you compare building the startup in Europe versus the US? Because as far as I know, the Department of War and Department of Commercials, they also have those common initiatives the FUSE program that they dedicated 750 million to make sure that the startups are being empowered. There are so many initiatives around nuclear energy as well, just to make sure that depending on the track,

Nihal Kurth

and in your track that you guys are easily in the defense on, how do you see the support? How do they make your life way easier for young people trying to make such a meaningful change?

Matija Milenovic· Hop Aero

I actually think it the US government is obviously like they they're very supportive, they're obviously like a lot more advanced when it comes to defense and deep tech and things like that compared to Europe. But even if they did nothing, I think it's a cultural

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

thing. I think just what what I've seen is that attitudes in the US are a lot more open to getting things done compared to Europe, where usually bureaucracy just tends to slow things down to a crawl and it's sort of like the

Matija Milenovic· Hop Aero

the the default state for a lot of things is that eventually you die die by bureaucracy. not always, but and so that's

Nihal Kurth

Hmm.

Matija Milenovic· Hop Aero

the thing that like the you know, since World War Two, the US had this culture of building an industrial base and obviously it was lost for, you know, after the Cold War. it's being rebuilt. But it it has this culture of of builders, it has this culture of building a defense kind of ecosystem. In Europe that's pretty much only starting to form now. I think Europe has a lot of potential.

Matija Milenovic· Hop Aero

But I also think that it's definitely behind when it comes to the the culture of building things and getting things done compared to the US. so of course, like the there's y you know, we could kinda get into the details of of government support and all that, but I I think it really boils down to kind of cultural approaches. I think there's definitely a lot of very, very smart, hardworking people in Europe, both engineers, founders, but it's also it's that. And then it's also just the availability of capital as well that

Matija Milenovic· Hop Aero

eventually a lot of European companies end up going at like series B or C to to the US just to be able to raise the capital that they need.

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

so I think those are two just like long term problems that that Europe has to to overcome.

Nihal Kurth

Yeah.

Nihal Kurth

Yeah. And also at the same time, risk, appetite, also sense of urgency, these all come down to like certain characteristics that kind of have been there for a very long time. I hope that things change in a good way. This is really, really exciting, but I am also aware of the time. A couple of things that come to my mind.

Nihal Kurth

Once you have this taste of entrepreneurship, which you got and instead of pursuing further the product back then you gave the IP.

Nihal Kurth

And then you moved out to work on another project. What was the decision making back then? What trade off in your head you made with that decision?

Matija Milenovic· Hop Aero

so we we weren't able to to raise another round of funding and so we were trying to this is like when effectively the kind of the impact of the COVID bubble bursting. so like the z the

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

zero interest rate period was dying out, like there was effectively a freeze kind of in what was that late twenty twenty two in in venture funding. It was like even now I can see all the graphs, it was like a minimum and that's like the worst time to like run out of funding. and so

Nihal Kurth

out

Matija Milenovic· Hop Aero

our thinking was like can we can like just wrap up the company or we can

Matija Milenovic· Hop Aero

sell off the IP such that at least it'll be you know continued to be developed by somebody else, useful to somebody else. we had spent, you know, a lot of you know blood, sweat and tears building building out that IP in the propulsion system and so on. And so we really wanted to make sure that it wasn't for nothing. so that was that was a lot behind the decision. And then I also like again it's like just I I actually very briefly went to San Francisco in the kind of Bay Area right after that to figure out like just to talk to people and figure out what I wanted to do.

Matija Milenovic· Hop Aero

and

Nihal Kurth

Yeah.

Matija Milenovic· Hop Aero

I kind of realized there that there's this I'm actually calling from San Francisco right now. people are a lot more open to you failing and just like try something different. So like if this doesn't work out, that's fine. Just go go try something else. You can try like ten things, fail at all of them, and then the eleventh thing you become successful at and then you're Sam Altman.

Matija Milenovic· Hop Aero

I think in Europe that's another thing again that like people have this like it I have to succeed at it. I can just do one very safe thing, but I have to be good at it. Failing is like the worst possible thing. it's again like this cultural

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

thing. and so I really wanted to just try something else. I've been I was telling Jacob we were driving from the test site a couple of days ago that like we have failed at so many things in our lives that you know we could write a you know, a a book or something.

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

But it's making

Matija Milenovic· Hop Aero

sure that you're learning from all of those and that's ultimately like in the long term, all of that knowledge compounds and that's how you get like one or two successes. and you know, every successful person has an infinite number of failures behind them. They've just had a very small success percentage, but that's all it takes.

Nihal Kurth

I think the most difficult part is when you try something new, you don't know if it's gonna work. And because if someone tells me, yes, that's gonna take off, but just be persistent, this is much easier to endure the pain. Because then I know eventually whatever I go through now is gonna be like worth it. But I don't even know it's gonna be worth it or not. Like when is the right time to... There's this nice visualization. Have you ever seen the guy keeps digging, digging, digging? yeah, the

Matija Milenovic· Hop Aero

Yeah, yeah. Yeah.

Nihal Kurth

guy actually the guy might...

Nihal Kurth

his day but he stops he's like nah that's bad luck I can't do it anymore and if he just went a little bit more

Matija Milenovic· Hop Aero

It's like what they say in

Matija Milenovic· Hop Aero

in the casino you're always one one roll away from becoming a millionaire.

Nihal Kurth

That's

Nihal Kurth

a very good one actually. You told me that I really want to honor that. You mentioned that as an outcome of our conversation, if one person, especially in the universities, especially some young person somewhere in this world, listening and changing their mind, that will reach the purpose of our conversation, what would that thing that you would have

Nihal Kurth

inspired or help them understand better or trigger the question in their head so that they can see the word differently.

Matija Milenovic· Hop Aero

I think so th there's a lot of really, really smart kids that have like their their whole life they've worked really, really hard, gotten amazing grades, and then they like just the way that the educational system pushes you, it feels like the next step in in that kind of successful ladder is going and working at a prestigious company, making as high of a salary as you possibly can. And I think it's for for some people that's totally fine, but I think for there is a subset of those smart kids that

Matija Milenovic· Hop Aero

It is it is a lot of wasted potential and you could be really, really smart and then you end up being really crappy at starting a a company, but you're not gonna know that until you try. Or you are very, very

Nihal Kurth

Yes.

Matija Milenovic· Hop Aero

smart and you end up being you know, the next Elon Musk or or whatever. And so that's kinda like how how I would look at that. it's I I would just encourage people to try. I think it's it's worth everybody at some point trying in their lives to to start a company. There is nothing wrong if it doesn't work.

Matija Milenovic· Hop Aero

You just go back and you you have like this three month period where you tried six month period or a year, and then you go back to work and if you're if you're good at what you do, there will always be like demand from the job market for you. but you could also profoundly change your own life and just have like the most crazy adventures and just talk to the coolest people, and have I I like to tell people like it's like building Dad Lore, like just do do crazy, crazy stuff. there's a very high chance that it'll be worth it. And e again, even if you fail,

Matija Milenovic· Hop Aero

Just like the fun that you will have had and the experiences that you will have gained will always be worth it.

Nihal Kurth

Yeah, totally agree. And also at the same time, as you said, you might be very capable, smart, but if you're in the wrong environment, if you don't keep experimenting things, you will never know. Then you will think that, that is me perhaps. I thought I was different. I had a university professor who used to say, if you put, there is nothing wrong being a puppy or kitten, but if you put the kitten among the puppies, the kitten will always think, I can't bark. I can't be loud.

Nihal Kurth

so strong or if you put the puppy among the kittens the puppy is gonna think something is wrong with him and he will try to adapt so therefore maybe perhaps you should find if you're a puppy you need to find puppies if you're a kitten you need to find the kitten so yeah I don't know little silly example but does it make sense to you

Matija Milenovic· Hop Aero

Yeah for sure. there's a lot of different ways of like putting it. I always just think just do it. Like j just just do it. And it's like every successful person that I've ever like watched them talk or seen a podcast or whatever, like they pretty much

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

the message is always consistently the same. I've never met a like a a a really cool founder who's like, Don't do this. Like, you know, I think th it's obviously hard. Like you're gonna have, you know, hardships no matter what you do. That's just it's a part of the game.

Nihal Kurth

when was the time somebody shot fate in you and then that kind of Opened a new door for you It might be in your most difficult

Matija Milenovic· Hop Aero

So many

Nihal Kurth

times, okay

Matija Milenovic· Hop Aero

so many. I I've had so many people in life being willing to pay it forward and introduce me to people or take a chance on us or, you know, whether that's like as a as an investor or advisor or you know, even hires, like just people people being like, You guys are crazy but I want to work for you. I've had so many people, especially when I was when I was younger,

Matija Milenovic· Hop Aero

I would be nowhere. I am nobody without th these people who have come before me. And all I can do is hope that one day I can be the same for other young people. I think

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

as I said at the start, we all have moral duties to some extent. And I think this is one that if if you have if you've learned something, you owe it to to the the next generation to pass it on. I have like so so many people to be thankful and and grateful for that it's it's really hard to like list by name because I don't want to put anybody ahead of anybody else, but

Matija Milenovic· Hop Aero

These people know who they

Nihal Kurth

Mm-hmm.

Matija Milenovic· Hop Aero

are and they know that I deeply appreciate everything that they've done.

Nihal Kurth

Awesome. As a closing, we always have a question from one of our previous guests. And this time for you, we had a question from Jamie Gall. Jamie Gall is an ex SpaceX engineer, varsity winter 2020 batch. He also had done two hardware startups. And his question for you is the following. But I need to read because I don't know my heart.

Nihal Kurth

What's something that was consensus but is now contrary or vice versa?

Matija Milenovic· Hop Aero

Ooh, that's a very good one.

Matija Milenovic· Hop Aero

I this is like oddly specific. I remember back in like the early twenty twenties, like twenty one, twenty two, there was a consensus that space like orbital transfer vehicles, so this is kinda like things that are like Ubers in space that move satellites from one orbit to another, that that was gonna be the next big thing. And this is one thing that we wanted to pivot to in our last startup and we were kind of pursuing it towards the the last end. and there was so much venture capital poured into this, so much like

Matija Milenovic· Hop Aero

hype and attention and everything, both in the US and Europe. and now there is like pretty much like two companies that are successfully doing all of this from like twenty or forty that were initially doing it. and it was like at the time it was like y you could not be more consensus than that. It was like if you're not doing space mobility, you're not doing orbital transfer vehicles, you're wasting your time, that kind of thing. And

Nihal Kurth

you

Matija Milenovic· Hop Aero

That's one thing that I've learned from from my experience is don't just chase what other people are doing. I g I I was younger, I was a lot more stupid. I'm

Nihal Kurth

Mm.

Matija Milenovic· Hop Aero

like very much I'm still stupid but less stupid now. and I've

Nihal Kurth

Yeah

Matija Milenovic· Hop Aero

I've just learned to like always critically think about things. It doesn't matter if like everyone's you know people think that if everybody thinks something they cannot be wrong because surely all of these people, you know, somebody's done the research

Nihal Kurth

Hmm.

Matija Milenovic· Hop Aero

in the homework and that's how you end up having things like ExxonMobil and how you have Bernie Madoff and how all these things can happen

Nihal Kurth

.

Matija Milenovic· Hop Aero

and

Matija Milenovic· Hop Aero

how orbital transfer vehicles can come and go. And so I I've definitely learned to like listen to people's opinions, value people's opinions, but also not like do do your own do your own digging and do your own research. Exactly.

Nihal Kurth

deductions. Yeah,

Nihal Kurth

this is an excellent way to say is there anything that I didn't touch base but you wanted to mention?

Matija Milenovic· Hop Aero

no, I I think this is a a great conversation. Really appreciate you having me on. I yeah, thoroughly enjoyed this.

Nihal Kurth

the same here. Thank you so much for the work you're doing and for inspiring so many people including Nika and me here. We really appreciate it. And thank you for your honesty. Totally, totally cool. Very cool. All right.

Matija Milenovic· Hop Aero

Hundred percent.

Nihal Kurth

Thank you.

Matija Milenovic· Hop Aero

Thank you so much.

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