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SystemTheory

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Let the big bus have mass M. The little bus has mass m = M/(12 x 12 x 12).

If there is zero atmosphere (air density rho equal zero) I figure this does not effect the scale down study. The mass drops out of the equation. However the distance traveled is 1/12 so the ramp exit velocity needed to cross the gap need not be as large.

I'll be looking closely at the scale down logic eventually, but figured I'd pose the challenge here for comment.