Get a block of balsa woodfrom the hobby store, some polyurethane from the
plastic store, some lead shot from the fishing store ( or other weighty
stuff) and some 1/16" music wire, also from hobby store.
Carve your car body from the balsa wood - 1950's F-1 would be about right
(and Vintage!). Add the weight as ballast - use the lead shot to get it as
heavy as possible, to have increased mass to help overcome friction. Use
the music wire as axles, and work to get a little spring, to help the car
ride easy over bumps.
Turn the wheels out of the polyurethane. This is where you can gain a bit.
Assuming the track is hard, put a knife edge on the tread, to minimize
friction. The poly is self lubricating, but drill a lube hole so that you
can spray WD-40 or moly spray lube into the bearing surface before a run.
Having written this, it sounds like a lot of fun!
Brian
At 01:11 AM 19/09/97 -0400, you wrote:
>My son has to build a car that weighs under 2 pounds and will travel
>at least 2 feet off an 8 inch high ramp. It must be built from
>scratch, NOT from a car kit. Does anyone have any suggestions,
>plans, where to look or where to begin?
>
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