Travis Marlatte wrote:

Why isn't there forward motion on the treadmill? The pressure differential
around the prop or the thrust from a jet will propel the plane forward to
takeoff speed on glare ice (wheels don't have to spin at all) or the
treadmill (wheels spin at twice the speed).

The Original Question said that the treadmill speed was such as
to counter wheel speed so that the airplane stood still. That's what I
was thinking. Somewhere along this thread the assumption must have
changed and I'm arguing apples against oranges.
No airspeed, no lift. Period. Propeller or jet blast is not going
to lift the airplane. We need forward motion relative to the
atmosphere, or a really strong headwind.

The tires used on light aircraft are Type III and are rated for
120 MPH max. They'd probably explode before 150 MPH, seeing that the
forces increase by the square of the rotational velocity. Or. more
likely, the average lighplane tire being as out-of-round and imbalanced
as it is, the vibration would shake the airplane apart by the time we
got to 120.

Dan