Wind it up and see what kind of distance you can get. Changing the rubber band, weight in the car and connection to the rear axle (if the rubber band...
Step 7: Cool air, raft release, curling
I read about this in the forums and it works for me. Block off the side openings (I used paper and masking tape). Don't allow breezes from cooling or doors to enter the chamber while in operation. This helped solve my problem of curling and separation from the raft.
Bio:@EngineerRigsby My blog on simple 3d design is at http://www.simple3d.tumblr.com/ I've also written an app, "How To Make A Science Fair Project." I am the author of "Doable Renewables," "Haywired"...read more »