Yaish, You tried, and very well I might add, to explain the facts of aircraft flight. Some people just don't get it. And some never will.

sdc, You are absolutely correct. Conveyor speed = -100mph, Wheel speed = +200mph, Therefore aircraft airspeed = +100mph, FLIGHT!!!!!!!!!

So, can an unladen swallow's little tiny feets go 200mph? Can you say blisters? There for a 747 with 200 souls on board cannot be true and must be a digital enhanced pipe dream to make us believe that the Mythbusters is real science.

I am so glad Don Herbert died before this subject ever came up.

I shall now go to contemplate important subjects like "if Teflon is so non-stick how do they keep it stuck to the pan?"