On Sep 29, 4:25*pm, ThinAirDesigns said:

In this analysis, we show that
in a 27.5ftsec wind, and with the vehicle traveling ***directly
downwind*** over the ground at 55ft/sec, the retardant force on the
wheels needed to drive the propeller is less than the propeller needs
to keep the vehicle at that speed.


[cough]bull****[/cough]