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We don't have access to equipment like that. But for now, surviving 2 pressure tests, 7 hot fires, and a launch is perfectly sufficient in terms of part life when you consider that most groups just use their casings once...

Our next major launch will be the Space Shot. Currently scheduled for Spring 2026. We will have 2 or 3 minor launches before that to test out the avionics and recovery systems a bit more. But those will just be in Germany.

We are planning to launch the next rocket we build at FAR. That one will be targeting space. The combustion chamber is lined with pertinax and reinforced with a CFRP wound tube.

The nozzle is just made from stainless steel 316L

Well, you have to think a bit about what kind of Hybrid you want to build. We have built a Nitrous Oxide & Paraffin wax hybrid rocket which can be simple enough to start with. The Paraffin wax solid grain is easy enough to manufacture especially if you have experience making solid motors. Making the paraffin wax fuel is as easy as melting down a bunch of candles and re-casting them as a cylinder with a hole in the middle (check out our video about how we make our grain). But the main complexity upgrade is building a tank for the nitrous oxide and the hydraulics to get the nitrous oxide into the combustion chamber. To start, we would recommend just buying these items, however, if you want to make them yourself in the future, it may be a good idea to invest in carbon fiber winding as this will give you big mass savings. Good luck with your efforts!!

It is paraffin wax.

It is a hybrid rocket, so it uses Nitrous Oxide (liquid) for the oxidizer and paraffin wax (solid) for the fuel.

Well,we have never physically measured the sound. We are always in a bunker building about 30m away with concrete wall between us and from there it is very loud. Like 10x louder than a jet engine. If you were beside it, I imagine it would be dangerously loud. You can also tell because the cameras are all shaking from the vibrations, so the sound waves are intense. Finally, the engine at the launch was heard clearly all the wag to around 700m when the engine cut out. I imagine you would hear it from many km away based on how loud it was during the flight.

​​@@ASTRABremen Impressive! It would be interesting to set up a measurement device nearby and know for sure 👀

Raketentechnik ist ein globales Thema und wir sind ein sehr vielfältiges Team. Deshalb Sprechen wir English.

@ASTRABremen @ASTRABremen war ein witz... btw. ihr werdet sicher auf flüssig setzen am ende oder? hybrid is iwie ehr für den "privatanwender" also macht iwie wenig sinn aus wirtschaftl. sicht. gibt nen klasse ansatz flüssig flüssig von nem französischen team.. guyere space programm..gsp. thats looks like a rocket programm instead of pyrotechnic. use our taxmoney whisly!

@ASTRABremen @ASTRABremen war ein witz... btw. ihr werdet sicher auf flüssig setzen am ende oder? hybrid is iwie ehr für den "privatanwender" also macht iwie wenig sinn aus wirtschaftl. sicht. gibt nen klasse ansatz flüssig flüssig von nem französischen team.. gsp..

Flow rate is 2.5 kg/s. Oxidizer is pressurized to 1000psi.

Nozzle is made of graphite, pertinax, and stainless steel 316L

I think you are a bit confused about which organization we are... we build rockets, not submarines 😀

Lol!! Earth was definitely shaking!

XD Cute! I love it!

Well, it didn't work for Oceangate submarine.

@mtbeyker9404 they used it for the wrong application. Didn't even have a metal sleeve like most compressed gas cylinders with carbon fiber.

@mtbeyker9404it didnt have a shell or anything it was only carbon fibre

I know, but I still enjoy those videos your mom put out.

Kanns sein dass automatische Synchronisation an ist?

Name 5 engineering books you’ve read

More so, stupid people thinking they know engineering, then opening their fat lazy mouths to try to sound exciting.

“For some reason” doesn’t exist. There’s a reason for everything, it’s just that most of them are unknown.

Except this was done presumably by people that know what they're doing. I mean, it ain't rocket science.

@@MartKencudadidn’t he make a little rocket in the video 💀

​@@MartKencudait is exactly rocket science though.

Not entirely sure. On the 3rd and 4th hot fire, it seemed like the erosion was in the same place. But for the 5th one we used a different nozzle and it eroded at a different place. I think it just has to do with the geometry and imperfections of the nozzle components and insulation we were using. Beyond HF3 and HF4, there were no repeated patterns of nozzle erosion.

Adjusting the mass flow rate is tricky in a hybrid. We would need to switch injectors or adjust the tank pressurization level. Both of which have complicated effects. Plus we didn't totally understand the problem at the time. Lots of theories, but not enough data analyzed. But yes, adjusting the mass flow rate (more specifically, the oxidizer to fuel ratio) is how we will deal with this in the future.