- #51

diazona

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Yeah, well... if you do any quantitative analysis, post it here, I'd be interested to see if you can make the numbers work out. I actually considered running a simulation of the drag force on the bus, but what I wrote went on long enough as it was. What I'm aiming for is to give people* a taste of how physics applies in real situations, not to do a full accurate analysis.Great writeup. Thanks diazona. One thing I noticed in the episode was the short run to accelerate the model bus to 23 mph, and no clear reading on the radar gun. The radar gun could be off by +/- 1 mph according to some specs I've read. Also, once the front of the bus starts downward it is possible an aerodynamic downforce develops as well.

The takeoff drag force on the front of the full scale bus is > 1,000 lbs and on the scale bus at least 1/2 pound force (rough numbers). This doesn't slow the bus much over the short jump but I neglected the possibility of aero downforce.

*if anyone actually read my blog, which is doubtful ;-)