[EricH]

Originally Posted by gorrilla

i just had a quick thought, couldent you use lexan for a frame? that would be awsome it becomes very stiff once you bend it into a channel shape and it would be very light ,

it dosent crack or break normaly at least i have never seen it

only problem i could see with this is it developing a crack where you drilled a hole for a axle or corner bolt and it just snapping after a while

Lexan has been done. It wasn't bent into a channel shape, it was built as a box by bending the edges and bolting. I seem to recall the 2007 design book saying that they used a Kitbot frame, or part of one, as reinforcement in the drivetrain. The team in question, IIRC, is 1714.