Can a Model Rocket Fly Without Fins?
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- Опубликовано: 28 авг 2024
- "GLOW" is a Trust Vector Control (TVC) model rocket weighing only 237g.
It is built with a custom STM32-based flight computer that I designed and a few 3D-printed components.
It also features an original parachute system design.
You can find some shared materials related to this project in the github repo
github.com/Pos...
Well done! I love the ingenuity behind designing around smaller motors, as well as the spring loaded parachute mechanism.
Thank you, glad to see you here! I'm subscribed :) Huge congrats on landing, your perseverance is legendary. Waiting for part 3 of your series :)
Really well done Dima! Look forward to see the next video!
Great! Looking forward to more projects and videos.
Absolutely, well done! Thrust Vectoring is great for model rockets. Nice work.
Thanks a lot!
Thats some top tier content right there
Great job man, very clean designs
Thank you!
Almost!
Bro from did you got your degree that was amazing ❤❤❤❤
Amazing! Very excellent!
Very cool!
great explain
Congratulations on your parachute ejection system but (as you point out) there is a better way....hint...look at the Space Shuttle...respond to me for details
Exelente trabalho! Achei interessante a abordagem de utilizar um STM32 como unidade de controle. Eu adoraria que você pudesse comprtilhar a exeperiência de programação desse microcontrolador. Infelizmente existe pouco conteudo sobre aplicações dos STM32 em modelos de foguete. 😃
Thanks! I found STM32 very feature rich and having an excellent documentation/tools/community support. So everything controller-specific like working with peripherals, timers, etc was very straightforward -- very good hardware abstraction layer (HAL) and easy to find examples/tutorials how to use it. Let me know if there is something specific you would like to learn :)
As I understand it, it's *impossible to control rotation along the longitudinal axis of a single motor.*
So there's a *gyroscopic moment* in the rocket that you can't control with this model, which affects the rocket's ability to rotate along other axes and its stability.
To remedy this problem, I recommend using *three motors of equal power, combined in parallel on a circle around the longitudinal axis of the rocket.*
Two motors would be the minimum, but would give a planar symmetry that wouldn't match the rocket's axial symmetry very well.
That's true. This rocket was built with the hope that "it probably will not get too much roll speed". A proper rocket should have some roll-control for sure. But using more motors was a huge complication. A much more complex TVC system, control algorithm, simultaneous lighting of several motors etc. I will definitely try a two-motor model with roll-control in future since I have more experience now.
Paint it black so we can see it in the sky.
Will fix that next time!
Have you looked at the CG and CP positions in relation to the front end of your design? Instaility may arise when CP is sitting over CG or is behind CG point.
The CG is slightly behind the CP, so yeah the rocket has no stability at all. You can see that it instantly starts spinning when the motor burns out. But it is meant to be unstable.
Great project, I was looking for something like that for a long time, can you add more details about the project.
Thank you! What kind of details you are interested in? Electronics, software in general, navigation/control or something else?
I like designing flight computers and the internal electronics inside, how shall I proceed forward?
1) Check Phil's Lab channel, I learned watching his old videos where he designs for STM32 with KiCad. He explains every step really well.
2) Read datasheets for electronic components -- in many cases there are instructions how to use them.
3) If you don't know how to design something special - try to find some reference on the Internet and learn from that example.
It's not really a hard thing to do, just go for it! Let me know if you have more questions :)
Thanks for the heads up! I have just started my sophomore year in my college in electronics, so just wanted to ask, how shall I proceed forward@@Positive_Altitude
Will you make the electronics or the software open source ?
I am not planning to, because they have so many problems and everything is not documented. So I think it is a bad material to use/learn from. But I am working on the new rocket that will be 100% open source. Let me know if you still think you need software/electronics for that project, I can give it to you.
great jorb!! Can you share the 3D files of the stabilization system, please?
Thank you! I am traveling now, but I can share them in one week. Also I am designing a new rocket that will be fully shared, including electronics, software and 3D files. Stay tuned :)
@@Positive_AltitudeCould you please share them with me as well? Thank you so much!!!
@@calebmurray3581 I added Github repo with these STL files in the description
@@Positive_Altitude thank you
Can you share the stm32f722xx source code please?
Well, I can. But the problem is that code is quite complicated technically. It is built with STM32_HAL using FreeRTOS, DMA, interrupts, and some ProtoBuf encoding. And everything is very dirty and poorly structured. So I think it is quite unreadable. And I am not going to put more effort into it because I started using Rust language for my other projects and not going to use C anymore :). So, let me know if you are still interested and I will share it as it is. Also, let me know what you want to learn from it, maybe I will cover it in future videos!
Интересный материал. Делай такие обзоры на русском языке, думаю будет много подписчиков.
Лондон из Капитал😂😂😂😂
fins don't work in space or extreme altitudes, so this is important technology. 👍
в целом акцент приемлемый, видал в разы хуже