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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.

Colored FTC tubes

Discussions about rockets, construction materials, adhesives, nozzles, nosecones and fin design.
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Braaainz
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Colored FTC tubes

Post by Braaainz » Mon Aug 20, 2018 9:50 pm

In my googling, I found colored FTC tubes in both T-8 and T-12 sizes at 4' lengths.

They're definitely more expensive than regular FTC tubes about $3-5 USD, with shipping to my location to be about $8-14 USD.

I think they'd look amazing, but don't know if the coloring would make them more liable to break.

Anyone try them before?



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anachronist
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Re: Colored FTC tubes

Post by anachronist » Mon Aug 20, 2018 10:38 pm

The coloring, I think, would only cause the plastic to absorb more sunlight, eventually degrading it over time.... but that time is likely to exceed the expected life of your rocket by a long shot. Go for it. It will save you the trouble of painting or coloring your rocket, saving weight, and the color may help the rocket be easier to find.

Me, I like using green 2-liter bottles rather than clear ones.



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retrotec29
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Re: Colored FTC tubes

Post by retrotec29 » Tue Aug 21, 2018 11:13 am

The color makes no difference in the strength of cover. I have been playing with clear and colored over the last year. The absobtion of sunlight can be a problem like anachronist mentioned. Over time I would agree it will degrade but adhesives are sometimes vulnerable to the heat. I had a FLT rocket in the car to long and ran it out to the pad. To my surprise my pressure tested rocket blew apart well short of the limit. Pretty cool event when the recovery pod shot about 50 feet into the air. I like to work in clear myself.
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Braaainz
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Re: Colored FTC tubes

Post by Braaainz » Wed Aug 22, 2018 2:44 pm

retrotec29 wrote:
Tue Aug 21, 2018 11:13 am
How did you make that nosecone?!?



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retrotec29
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Re: Colored FTC tubes

Post by retrotec29 » Wed Aug 22, 2018 2:56 pm

A paper model was made to fit over a shrunken bottle end. The taper touches the cap and FLT tube shoulder. Bottle cap is used as a shock cord anchor. Lots of tape and heat makes the shape hold while the glue dries. Not very aerodynamic in subsonic design but looks cool. A little on the lethal side I will admit. But my launch site is far from any population.
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