RC India

I want to build a rocket that can takeoff and land by thrust vectoring similarly to the SpaceX ones. The engine I will use is a metal body of an old torchlight ( The Halogen bulb torch). Has anyone ever attempted liquid engines? As, solid ones doesn't have controlled combustion even in real large ones. I will use cables and servo to control the angle of thrust with Arduino and looking forward to use a small receiver and a servo to control the flow of fluid and oxidizer. Will it succeed? P.S. The rocket will be tested far away from me.

 {:)}
I like your idea!!
But i don't know anything about it  ;D
btw, by "liquid" what do you mean exactly??


 :hatsoff:

The fuel should be a liquid like kerosene or an alkyne or glycerine etc pressurized by an inert gas like N2 ,and an oxidizer like liquid oxygen, N2O , H2O2 etc pressurized with an inert gas. We could even use oxygen gas.

I'd suggest against getting started with a liquid-propelled engine.

I'd say, get the data using just a BLDC motor, for thrust, and use servos or secondary motors to control the rocket.
I've not done that, personally, but I had always wanted to. So, that was how I was thinking to do.

After getting stable data, you can go after a propellant-propelled rocket. I guess there's a video from TomStanton related to the topic. Although it's not very informative, maybe you'll get an overall idea of how should the structure look like.

If you want some real solid data, google for missile and rocket guidance systems. So, that will generally include the stabilization part. Once you master that, go after the controlling part.


Hope that helps.

Me suggesting you otherwise is solely due to the safety factor. Not only yours but also people who surround you.
And using a BLDC motor slows down the entire process of flying. You can very well control it, rather than anything that burns.

Anyways, here's the video:

https://www.youtube.com/watch?v=_kd64VE3A1c

I'm actually testing it in an Uninhabited Island ( I specified that I will test it far away) , I have seen that video , but it is not a rocket. It's just that I want to know about anyone who has ever tried liquid rockets.
P.S: I have nearly killed myself the last time I tested a rocket. Will never ever go near that thing anywhere closer than 50 mga.

I think the original poster's question is:
"Has anyone ever attempted liquid engines?"

@AL HAM SHARI

It's really a good thing to get started slow. Nothing wrong about that.

Considering your age (no offense with that), you might very well be attracted by public authorities. Again, it's not only about you, it's about others who might also be affected by.

I once asked a friend if he had any experience in rocketry (guidance), and he ended up blocking me. So, apart from physical harms, make sure everyone you talk to, is fine with it.

My 2 cents of advice;
I have not attempted liquid fuelled rockets. I did read a little about them 3-4 years ago because I had a little interest in them. They need to be large. There's so much hardware and equipment that the rocket will be 1-2 meters high. All the parts have to be designed and made with metal must be CNCed.  The fuel system has to be very carefully planned out as well. you'll need an oxidiser and a source of constant ignition that can be kept alight in the presence of fluids flowing at high velocity.
A servo would be too inaccurate and an Arduino won't have the capability to handle precision movements.
For the thrust vectoring and Space-X lookalike landing; there will be a lot of research required.
Give it a try if you have the proper permission to launch a fuelled rocket and the cash as well because this can't be done on the A-motor rocket scale. (Which I helped you with)
Regards
Not meant to hurt you in any way. Just saying the necessary things. I get scared when I look at the complex diagrams. Here's a helpful link:
https://science.wonderhowto.com/how-to/be-your-own-spacex-design-build-test-liquid-fueled-rocket-engines-0122917/

Thanks bro, that link looks cool, I don't actually ask any permissions normally. I think that , as long as the object is not guided and  launching s not near no fly zones and isn't launched too high and near inhabited areas. The authorities won't probably give a crap.

Funniest part is that , I have the pdf version of the thing you sent me , that thing was copyrighted and if they see it on wonder how to they would probably sue them. I got it on the bay of pirAtes😂.