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Re: Bottle Rocket B
Posted: November 18th, 2010, 3:03 pm
by robotman
i find polyurethane but have never actually tried them side by side
Re: Bottle Rocket B
Posted: November 22nd, 2010, 7:50 pm
by calgoddard
Virtually any adhesive that meets the rules is adequate, i.e. silicone or polyurethane adhesives. This is probably the least important factor to experiment with in this event. Work on fins, nose cones, CG, etc.
Re: Bottle Rocket B
Posted: November 23rd, 2010, 12:43 pm
by Jocool
Does any body know the purpose of the water in this event? Is it just for weight, or does it help propulsion?

Re: Bottle Rocket B
Posted: November 23rd, 2010, 1:25 pm
by AlphaTauri
It's for propulsion. Since water is non-compressible and air is, the high air pressure inside the bottle will force the water out with more force than air would force air out with. Which hopefully propels the rocket skywards.
Re: Bottle Rocket B
Posted: November 29th, 2010, 7:37 pm
by scifipi
What should I use for a nose cone?
Re: Bottle Rocket B
Posted: November 29th, 2010, 7:39 pm
by robotman
it depends on your design.
paper works, plastic works, Styrofoam works.
just make sure a bottle cap can be set on top without a problem
Re: Bottle Rocket B
Posted: December 4th, 2010, 11:31 am
by amerikestrel
My first attempt at creating a bottle rocket has utterly failed. I suppose that's what I get for not reading the instructions on the glue bottle.

Re: Bottle Rocket B
Posted: December 4th, 2010, 11:38 am
by Jocool
Did it do a nose dive?
Re: Bottle Rocket B
Posted: December 14th, 2010, 5:07 pm
by jason60069
Is there anything that we should be adding other than fins and a nose cone?
Re: Bottle Rocket B
Posted: December 14th, 2010, 5:07 pm
by jason60069
Also, what kind of times are you getting on your rockets?