First I'm not a pilot.... But the engine is providing thrust, not driving
the wheels like a car. The airplane is gonna move regardless of what speed
the wheels are or are not turning. What the wheels do is only slightly
relevant if at all unless you're holding the brake....and even that wouldn't
matter if you're on a treadmill. Second.....are we talking about a
treadmill or a conveyer belt? The treadmill may or may not move at all
relative to the world if it's the "classic" kind ... (i.e. non-motorized).
Depends on whether the wheels or treadmill has better bearings.

"Morgans" wrote in message
...

"Doug" wrote in message
oups.com...
What is keeping the airplane's speed up with the conveyor belt? The
propeller. Said propeller moves air. Air causes lift. The problem is
more complicated than it seems to be at first read.

Another way to say it; it had better be a long conveyer belt, cause the
prop
is pulling the plane forward, without caring how fast the wheels are
going.
That will make the necessary airspeed to lift off.
--
Jim in NC