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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.

Interchangeable Launch Tubes?

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
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EtDM
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Interchangeable Launch Tubes?

Post by EtDM » Tue Apr 12, 2016 12:09 am

I'm constructing a 22m similar to the one described on the US Water rockets website here:

http://www.uswaterrockets.com/construct ... torial.htm

and I've been wondering if anyone has developed reliable system for interchanging launch tube, so I can launch rockets of different lengths. I'm building this launcher around 1 liter bottles, but I'd like the option to shoot larger rockets later without constructing an entirely new launcher.

Is this something that anyone has done?



skysaber89
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Re: Interchangeable Launch Tubes?

Post by skysaber89 » Tue Apr 12, 2016 12:15 pm

I have. I used a brass Gardena hose quick connect female launcher side, and male on the launch tube side. This allows for quick replacement. I can take pics later if you would like, but I am not home right now. I would use this system in conjunction with a launch rail, as the connection is not necessarily a super sturdy one. It will hold, but the rocket may (will) wobble.



skysaber89
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Re: Interchangeable Launch Tubes?

Post by skysaber89 » Tue Apr 12, 2016 3:57 pm

Here are those pics I mentioned from earlier.
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addstogether2
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Re: Interchangeable Launch Tubes?

Post by addstogether2 » Tue Apr 12, 2016 5:38 pm

Yes I too tried the connections as above and found the same, they were not overly stable. I change to a screw in version with no guide rail works well.

I will send pics when I can


Life is like riding a bicycle. To keep your balance you must keep moving.
"Albert Einstein"

EtDM
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Re: Interchangeable Launch Tubes?

Post by EtDM » Tue Apr 12, 2016 7:10 pm

Thanks, I appreciate the replies here.

I've been considering how to do a screw-in system myself, so I'm definitely interested in seeing your solution.



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addstogether2
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Re: Interchangeable Launch Tubes?

Post by addstogether2 » Tue Apr 12, 2016 7:19 pm

No problem when I get home ill take some. Still at work at moment.


Life is like riding a bicycle. To keep your balance you must keep moving.
"Albert Einstein"

addstogether
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Re: Interchangeable Launch Tubes?

Post by addstogether » Thu Apr 14, 2016 9:19 pm

Hi here are the pics I mentioned before when at work
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addstogether
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Re: Interchangeable Launch Tubes?

Post by addstogether » Thu Apr 14, 2016 9:20 pm

And emergency dump on compressor



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Jamie5335
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Re: Interchangeable Launch Tubes?

Post by Jamie5335 » Sat Apr 16, 2016 7:40 am

Hello,

I use the gardena System. For changing the size of the launch tube, I use a technique similar to the first reply post. Using different adapters with a male gardena connector on them, you connect them to the launcher and then just change which gardena head you release to release the correct part of the assembly (the rocket). The 15mm launch tube fits very well into the plastic 15mm release head. Removing it and adding it with brute force has always worked for me. Just use silicon gel to stop the rocket catching on it and pulling it out of the launcher!

Jamie B


JSB Rocketry
Website: www.jsbrocketry.webs.com
Youtube: https://www.youtube.com/channel/UCczlD-uBjlYdJyBFEfuCEbg/feed

Jamie Bignell,
jamie.s.bignell@gmail.com
Somerset UK

"The important thing is to know how to take all things quietly" -Michael Faraday.

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addstogether2
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Re: Interchangeable Launch Tubes?

Post by addstogether2 » Sun Jun 19, 2016 5:27 am

Yes I have used the male connector with a launch tube however I would either glue it in or have the end flared so it can't go up with the rocket. The last thing you want is the launch tube falling from a height. Male connectors are not that costly either.

Al


Life is like riding a bicycle. To keep your balance you must keep moving.
"Albert Einstein"

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China_WaterRocket
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Re: Interchangeable Launch Tubes?

Post by China_WaterRocket » Thu Mar 02, 2017 9:02 pm

Good hands-on ability.


I come from China, do not understand English, your information I use the translation software to view. I like water rockets, technology is the same, I hope we can become friends.

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