engine

Hi! I've been putting together a simulation for a rocket in RocketPy, however it needs the following Rocket motor parameters: dry inertia, nozzle radius, grain number, grain density, grain outer radius, grain initial inner radius, grain initial height, grain...

So maybe this a problem no one besides myself needs solved but in all my years of rocketry I didn't think to do this until now. My dad was old school and wouldn't fly a design unless it passed a swing test and with very few exceptions I inherited this part of the hobby from him. (Yeah, I know...

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...

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...

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...

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...

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!

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...

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 !