The question I would have is that the reason that the teather car can go so fast is because since it is conected to line and when it gets to the end of its line the weight of the car is cought in the line and there is less weight for the engine to push, hense the reason why teather cars go so fast...if you put one up against a super fast regular real driving R/C then I believe the teather car would get beat....
Just my two pence.
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