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what does the race track look like?
Will you accelrate to 30 mph, then maintain forever, or is there start, slow down, speed up?
Below 30 mph, weight often has more drag then wind. So, minimum weight is obviously a BIG goal.
From there, whether to add the weight of the body or not depends on the course. If you are usually below 15 mph, it might be tough to justify a body.
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