Quote
The prime mover is indeed coupled to the treadmill thanks to gravity - the entire craft is one body, one object, one piece of mass - how are the wheels magically independent of the rest of the mass that it shares?


Because of the absense of friction, gravity will simply oppose any vertical motion. Two forces perpendicualar to each other cannot bind two objects without a rigid coupling or friction. The wheels ARE independent of the horizontal equation and simply act as vertical stabilizers upon which the plane sits (again in the absense of friction).

73
-Jon
KJ6GVM

As seen on Expedition with TX plates: VEGETARIAN - An old Indian word for poor hunter

Grampa's Trooper
1974 FJ40
1987 FJ60