How do you reduce friction for a balloon powered car?
Graphite powder is an awesome lubricant, use it in the axles tubes,(depending how the car is made), if it doesn't have axle tubes, adding them would greatly reduce frictions, basically glue in a straw that is slightly bigger than your axles then put the powdered graphite and its like a slick bearing now, just don't use anything wet, stick with dry lube..
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