Quote:
Originally posted by Mobycat:
Quote:
Originally posted by MattyX:
[b]Ergo- plane travels 120 KIAS, conveyor goes 120 knots, wheels spin at 240knots until liftoff.
Then it's an infinite acceleration.

The plane is not travelling at 240 knots in air speed (assuming that's what KIAS is). It's travelling at ground speed relative to the conveyor belt. It's not moving in airspeed.

At some point it WILL hit it's limit. Engines don't have an infinite speed.[/b]
I thought you were going home. Short commute, huh? Nice [drink]

You're partially correct, then totally wrong. The plane is travelling at 120 knots indicated arispeed. Therefore, relative to the ground (not on the conveyor) it is travelling at 120 knots (ground speed) at sea level. Relative to the surface of the conveyor, the plane IS TRAVELLING at 240 knots.

Here it is again, as the plane travels:

Airspeed-120 knots

Groundspeed (at sea level in no wind)-120 knots

Speed relative to conveyor surface- 240 knots

Read TJ's post again, thoroughly.

::eta:: Lizz, I'm glad you think so. Thanks for indirectly getting this going.