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A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

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How would I build a water rocket with a helicopter recovery system?

Members post instructions to construct water rockets, launchers, deployment systems, staging mechanisms, splicing bottles, and payloads.
jonzeyyy
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How would I build a water rocket with a helicopter recovery system?

Postby jonzeyyy » Tue Jan 17, 2017 7:27 pm

Hello!

I am new to this website and I was directed from someone on Reddit but I am looking for help on my job of creating a helicopter type of water rocket that will slowly flutter down.

What materials would I need to gather? and how would I make it pop out? Thanks!
skysaber89
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Re: How would I build a water rocket with a helicopter recovery system?

Postby skysaber89 » Thu Jan 19, 2017 8:27 am

May I just ask why you wish to build such a system? It is far easier to make a parachute.

However, it does sound like an interesting idea. I may look into it a bit further and get back to you.
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Blenderite
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Re: How would I build a water rocket with a helicopter recovery system?

Postby Blenderite » Sun Jan 22, 2017 8:21 am

:W WELCOME TO THE FORUM!!!!!! :W

Are you wanting to build this as a electronics free rocket? If so that will make your job 100x more difficult to get a reliable system. I would go for a USWR ALTImeter computer to time the release of a blade mechanism. You will also need to make sure that the CG is at the bottom of the rocket or it will fall nose first every time (I think, correct me if I am wrong).

Basically, yes it is doable, but if this is your first rocket, which it sounds like it might be, I would start with a parachute recovery system just so you can get the basics down, then go for a more complicated system like what you are talking about here.

Just my 2 cents.

-Blenderite
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Check out my YouTube channel: https://www.youtube.com/c/Blenderite

"Get it right, then go for GREATNESS!"
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anoymous
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Re: How would I build a water rocket with a helicopter recovery system?

Postby anoymous » Tue Jan 24, 2017 9:23 am

Blenderite wrote::W WELCOME TO THE FORUM!!!!!! :W

Are you wanting to build this as a electronics free rocket? If so that will make your job 100x more difficult to get a reliable system. I would go for a USWR ALTImeter computer to time the release of a blade mechanism. You will also need to make sure that the CG is at the bottom of the rocket or it will fall nose first every time (I think, correct me if I am wrong).

Basically, yes it is doable, but if this is your first rocket, which it sounds like it might be, I would start with a parachute recovery system just so you can get the basics down, then go for a more complicated system like what you are talking about here.

Just my 2 cents.

-Blenderite

if i recall correctly, the center of gravity has to be below the center of pressure
and as i can imagine a helicopter system is kinda heavy, this could pose a problem.
maybe you can and move the Cp up and the Cg down?
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.
skysaber89
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Re: How would I build a water rocket with a helicopter recovery system?

Postby skysaber89 » Thu Jan 26, 2017 2:26 pm

anoymous wrote:
Blenderite wrote::W WELCOME TO THE FORUM!!!!!! :W

Are you wanting to build this as a electronics free rocket? If so that will make your job 100x more difficult to get a reliable system. I would go for a USWR ALTImeter computer to time the release of a blade mechanism. You will also need to make sure that the CG is at the bottom of the rocket or it will fall nose first every time (I think, correct me if I am wrong).

Basically, yes it is doable, but if this is your first rocket, which it sounds like it might be, I would start with a parachute recovery system just so you can get the basics down, then go for a more complicated system like what you are talking about here.

Just my 2 cents.

-Blenderite

if i recall correctly, the center of gravity has to be below the center of pressure
and as i can imagine a helicopter system is kinda heavy, this could pose a problem.
maybe you can and move the Cp up and the Cg down?



You got the two mixed up, cp should be behind cg.
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Blenderite
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Re: How would I build a water rocket with a helicopter recovery system?

Postby Blenderite » Thu Feb 02, 2017 5:47 pm

Sorry if I got that wrong. I am not a physics guy! I just launch and hope it works!
-Blenderite

Check out my YouTube channel: https://www.youtube.com/c/Blenderite

"Get it right, then go for GREATNESS!"
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anoymous
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Re: How would I build a water rocket with a helicopter recovery system?

Postby anoymous » Thu Feb 09, 2017 12:30 pm

skysaber89 wrote:
anoymous wrote:
Blenderite wrote::W WELCOME TO THE FORUM!!!!!! :W

Are you wanting to build this as a electronics free rocket? If so that will make your job 100x more difficult to get a reliable system. I would go for a USWR ALTImeter computer to time the release of a blade mechanism. You will also need to make sure that the CG is at the bottom of the rocket or it will fall nose first every time (I think, correct me if I am wrong).

Basically, yes it is doable, but if this is your first rocket, which it sounds like it might be, I would start with a parachute recovery system just so you can get the basics down, then go for a more complicated system like what you are talking about here.

Just my 2 cents.

-Blenderite

if i recall correctly, the center of gravity has to be below the center of pressure
and as i can imagine a helicopter system is kinda heavy, this could pose a problem.
maybe you can and move the Cp up and the Cg down?



You got the two mixed up, cp should be behind cg.

i wasnt sure
thanks for correcting!
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
- Albert Einstein

Sorry for malconstructions in my sentences, I am Belgian. And I was never good at making easy sentences.