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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.

Boosters, splicing, Robinson coupling help!

Members post instructions to construct water rockets, launchers, deployment systems, staging mechanisms, splicing bottles, and payloads.
flett044
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Boosters, splicing, Robinson coupling help!

Post by flett044 » Sun Jun 28, 2015 1:25 am

I was wondering if some one could give me a dezine for easy fall away boosters. Also easy robinson coupling plans, and also will liquid nails work for splicing?



flett044
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Re: Boosters, splicing, Robinson coupling, staging help!

Post by flett044 » Sun Jun 28, 2015 1:30 am

I need help with a dezine for falling away boosters and an easy robinson coupling, will liquid nails work for splicing? Also an easy staging mechanism dezine would be nice thanks



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bugwubber
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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Sun Jun 28, 2015 10:19 am

Liquid Nails is a no. Are you able to get a polyurethane glue like pl premium?


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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Sun Jun 28, 2015 10:57 am

Getting ready to launch this airstart/staging mecahism today if plans go well. The lower stage has a glueless pvc (no metal) version of the robinson coupling on board as well. I'll let you know how it goes.

viewtopic.php?f=3&t=2682


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flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Sun Jun 28, 2015 12:24 pm

I can get pl



flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Sun Jun 28, 2015 1:11 pm

Will pl 750 work? Or does it have to be premium? Can some one also tell me how to attach bottles end to end



flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Sun Jun 28, 2015 3:01 pm

Or does pl roofing glue with polyurethane work?



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bugwubber
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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Sun Jun 28, 2015 4:26 pm

PL Premium 3x or 8x is well tested and what I know will work. Anything else, you will be experimenting.

Check out the How to section of this forum yet? Some good stuff there.


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flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Sun Jun 28, 2015 5:06 pm

No I'll check it thanks



flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Mon Jun 29, 2015 5:27 pm

Pl roofing glue worked great !



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bugwubber
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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Mon Jun 29, 2015 9:41 pm

Great! Best cure time for the plp is at least 4 days. But then the bottle should fail first.


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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Wed Jul 01, 2015 10:15 am

Wow my phone must have mangled my post. Is the pl roofing black? I'll be very interested to hear your results.


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flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Wed Jul 01, 2015 2:38 pm

Its black, it didn't burst at 80 psi, but the pvc launcher did lol



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Re: Boosters, splicing, Robinson coupling help!

Post by bugwubber » Wed Jul 01, 2015 3:06 pm

Oh um, you're supposed to use Schedule 40 at a minimum... best solution is to use steel for lower and screw on pvc launch tube. But pvc sched 40 works if you keep it under 200psi


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flett044
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Re: Boosters, splicing, Robinson coupling help!

Post by flett044 » Wed Jul 01, 2015 3:58 pm

I'm actually gonna build a gardena launcher( I think that's what its called )



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