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I can't find the French competition, ironic given that the front page of ukroc is full of French gov officials... Could you share the name if you have it?
The biggest one is C'space: https://cnes-edu-cspace.com/cspace-2025-en/ There is also the European Rocketry Challenge in Portugal: https://euroc.pt/
obrigado!
Software developers: I am begging you to put representative screenshots on the home page. This has become a real widespread problem. I know you want to tell us all about the amazing (sincerely!) stuff under the hood, but to users, the interface is the product.
Thanks for the suggestion, I've added it to our home page.
A short looping video of the software in action might also be good. But a lot more effort.
Software developers: I am begging you to put representative screenshots on the home page. This has become a real widespread problem. I know you want to tell us all about the amazing (sincerely!) stuff under the hood, but to users, the interface is the product.
Thanks for the suggestion, I've added it to our home page.
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Thank you so much for sharing this video, it's just amazing to see a bunch of young amateurs getting so excited about things that would have been virtually inaccessible 20 years ago.
It’s beautiful to see. They have put in such extreme amounts of hard work to get that thing into the air. Designing a robust affordable liquid propelled rocket from scratch is hard. There are so many design decisions, complex simulations, manufacturing difficulties, and tests for every little part of that 11+ m rocket. Accounting for extreme forces, heat variations, vibrations, wind, atmosphere, liquid sloshing, rota…
There is also the rocketpy framework. https://docs.rocketpy.org/en/latest/index.html Essentially it can do the same thing as openrocket, but in python. You can even go as far as to simulate liquid fueled rockets during flight, modeling for example how the depleting tank influences the center of mass. My student rocketry team used this for the flight simulation of our Ethanol/Liquid Oxygen rocket which flew to over 5k…
>My student rocketry team used this for the flight simulation of our Ethanol/Liquid Oxygen rocket which flew to over 5km Cool. Is there more information on their rocket or a video?
Also here is our technical report: https://spaceteam.at/wp-content/uploads/2025/10/Technical_Re...
Feel free to ask any questions. I’m the software lead of the project :)
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No, _I_ highly recommend you to open a few foreign newspapers and lurk in foreign (to whom?) forums, groups, &c. you're either misinformed or blind, based on these bullet points. Stop reading r/iran or CNN or whatever bs you pump into your brain. This war sucks but it's very far from "Iran is holding".
They're getting absolutely wrecked, but it doesn't mean it's good for the US. This is basically warfare 101, you can have a undisputed tactical victory and a complete strategic failure at the exact same time, in that case the tactical victory is bombing a country which is like 20 years behind in technology and spend 10% as much as the US on defense (wow good job!), the strategical blunder is that it did not achieve a…
We used OpenRocket for designing our rocket for UK youth rocketry competition UKROC[1]. It is great for getting a 'spherical cow in a vaccuum' idea of likely altitude with different motors, centre of pressure, center of mass etc. But it obviously doesn't take account of detailed aerodynamics etc and we found the maximum altitude estimates were about 15% too high. But it was still very useful. [1] UKROC is an amazing…
How hard is it to get started for amateurs? Are rules/regulations problematic?
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>My student rocketry team used this for the flight simulation of our Ethanol/Liquid Oxygen rocket which flew to over 5km Cool. Is there more information on their rocket or a video?
Sure! We launched at last years EuRoC Here’s a nice recap video: https://youtu.be/pc_Dvfo6m0g Also here is our technical report: https://spaceteam.at/wp-content/uploads/2025/10/Technical_Re... Feel free to ask any questions. I’m the software lead of the project :)
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> we found the maximum altitude estimates were about 15% too high. this often happens when the wrong rocket finish is selected. Everyone chooses a polished finish when in actuality they've just sprayed the thing with paint. Skin drag is real.
They also seem to be treating rockets as rigid bodies. Flex of parts is real at these accelerations but the calculations get into supercomputer territory very quickly. All the math is questionable if, at any given moment, your rocket isnt actually straight. Look into the physics of archery, which has similar accellerations albeit of a narrower tube. The choice between a heavier/stronger arrow v a lighter/flexible sha…
We used OpenRocket for designing our rocket for UK youth rocketry competition UKROC[1]. It is great for getting a 'spherical cow in a vaccuum' idea of likely altitude with different motors, centre of pressure, center of mass etc. But it obviously doesn't take account of detailed aerodynamics etc and we found the maximum altitude estimates were about 15% too high. But it was still very useful. [1] UKROC is an amazing…
Heh, UK tinkerer here :) How hard is it to get started for amateurs? Are rules/regulations problematic?
The UK regulations are fairly sensible and they won't let you do anything stupid at one the regional meets. Just start with something small (A/B/C motor) and work your way up from there. Don't try to start with a K motor, 2 stage or liquid propellant and you'll be fine.
Where are you based?