Bottle Rocket B

[reachgeek]

would a silicone or poly-urethane glue be best for securing foam to plastic or plastic to plastic....and yes i know foam is plastic......

[robotman]

I tend to use polyurethane it dries smaller than silicon

[reachgeek]

mabe ill try that thx

[reachgeek]

well once again i need to know what what make a stronger bond with plastic to plastic and plastic to foam.... a poly-urathane glue i prefer but mabe a silicone would do better............. and yes i know foam is a plastic........ if someone could help........

[reachgeek]

I tend to use polyurethane it dries smaller than silicon

I dont rly want what dries smaller but what bonds better....

[robotman]

i find polyurethane but have never actually tried them side by side

[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.

[Jocool]

Does any body know the purpose of the water in this event? Is it just for weight, or does it help propulsion?

[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.

[scifipi]

What should I use for a nose cone?

[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

[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.

[Jocool]

Did it do a nose dive?

[jason60069]

Is there anything that we should be adding other than fins and a nose cone?

[jason60069]

Also, what kind of times are you getting on your rockets?