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I was wondering if anyone has really experimented in building this into a glider?

I'm working on a couple right now and havent tested yet, but my main concern is the bottle stalling as it falls on its side. Has anyone figured out if this happens or if there is a way to take care of it?

Well I tested my first 2. Didnt go to well one i accidentaly blew the wings off :0 the other i launched and it went about 10 feet up and shot straight out like a missile and kind of glided into the ground 30 feet away. Both only lasted about 3-5 sec. Got a long way to go

My friend and I tested a couple rockets over the summer...the best we got was about 7 seconds (with a 2-liter Coke bottle, fins/nosecone made of paper and packing tape, and at around 50 PSI according to the gauge on the bike pump). I think it went about 60 feet up on average (key word: think, I'm horrible at estimation), and thankfully, no lawn darts.

Anyone have any firm idea on what constitutes a change of shape?

I'm not saying this would necessarily work, but say folding flaps that are held flat in place by drag, that then unfold to provide drag on the way down?

coterotie wrote:Anyone have any firm idea on what constitutes a change of shape?

I'm not saying this would necessarily work, but say folding flaps that are held flat in place by drag, that then unfold to provide drag on the way down?

I think that would qualify as both a change in shape and the deployment of a recovery system, both of which are prohibited. A good general guideline would be if it looks different when it comes down than when it went up, it had to change shape.

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......

I tend to use polyurethane it dries smaller than silicon

mabe ill try that thx

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........

robotman09 wrote:I tend to use polyurethane it dries smaller than silicon

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