The Rocketry Forum

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  1. Strevortni

    Hydrogen and oxygen powered rocket?

    So i have a lot of hydrogen and oxygen gas on me,and i thought,"How can i make a rocket engine with this?" I saw how fast this stuff burns when mixed and before i blow my head off,i kinda wanna get a heads up if i'm wasting my time with this,can i have the gases stored in separate containers,and...
  2. R

    Pressurizing and Cooling liquid fuel rockets.

    Hi! I am 11, and I’m quarantined at home and bored. So, I started building an imaginary rocket! I’m not sure what thread to put this in, so if anyone wants to give me some advice on using this forum I’d be grateful. This is my question: I had an idea, of using helium (does that even absorb a...
  3. P

    Motor Test Stand for M Class Motors

    How to design a rocket test stand for M class motors? I have searched a lot but I did not find any resourceful thread on high power rocket test stand. Just to give an example, I want to design a test stand for Cesaroni Pro 75 M 2020 Motor. Thankyou!. Any designs or links to other threads are...
  4. F

    TARC Questions

    Hi everyone, I'm leading a TARC team for the first time this year and I had a few questions. 1. We are using OpenRocket to model the rocket and everything looks fine but the flight time looks a little unrealistic. We are using two body tubes and the weight of the rocket is around 300g right...
  5. H

    HyperTek L550

    Does anyone know the mass flow rate for the HyperTek L550? I'm working on a transonic build and needed to ask this. I know that the equation for the mass flow rate is the density of fluid * velocity * cross-sectional area, but how do I find velocity and cross-sectional area? Thanks so much!
  6. D

    Control oxygen flow hybrid rocket engine

    Hi all, I built a small hybrid rocket engine and I would like to control the arrival of oxygen in the engine with an arduino card. What do you advise me: a solenoid valve? A valve with a servo motor? If possible, could you specify a model? It's been a while that I'm looking for without finding...
  7. D

    Hybrid rocket engine design spreadsheet

    Hi all, I am looking to design and build a hybrid rocket engine and I would like to know where I could find a spreadsheet to design a hybrid rocket engine. Or if any of you could share it with me. Thank you so much !