[meanderingthemaze]

The goal here is to come up with a simple-to-construct, cheap, light, aerodynamic panels, which aren't a hazard, such as being extremely flammable. They need not be very strong, only strong enough to hold up under head winds on the highway, and everyday driving conditions, NOT collisions. The strength of the chassis is all going to be in the tube frame. Passenger safety will come from that. The panels are only to reduce drag, which is why it would be great if they didn't weight anything.

Maybe I should posit the question this way. Would stretched (non-doped) fabric be better than nothing? If so, how much better, as compared to a tube frame (think dune buggy)?