That plane/conveyor problem - filmed solution
Discussion
For those who still can't see that the plane will take off, someone's made a film to prove the point that it would......
http://videos.streetfire.net/player.a
Apologies if this was shown before.
That skateboard / fan set-up bears no relation to the plane scenario. The skateboard doesn't have wings or anything to give it lift and the guy tugging the paper from underneath it is doing so in an inacurate manner that doesn't exactly match the opposing force of the fan / skateboard as it needs to.
paulie-mafia said:
That skateboard / fan set-up bears no relation to the plane scenario. The skateboard doesn't have wings or anything to give it lift and the guy tugging the paper from underneath it is doing so in an inacurate manner that doesn't exactly match the opposing force of the fan / skateboard as it needs to.
Must......resist........urge......to.......respond
mini_ralf said:
It'll never work. I was always told that it's airspeed over the wings that generates lift.. Simply moving something rapidly under the plane won't make the air move faster over the wings... Or have I really got the wrong end of the stick?
A lot depends (we think-Asked hung-over engineers and physicists) on t/w ratio's. if the t/w>1 then the plane should ake off without an lift, at t/w<1 lift is needed to achieve flight. Look at it like this two identical planes A (t/w>1) and B(t/w>1). Point them so they are facing vertically upwards. A will go up, B will not. Assuming (and its a big assuption) the conveyer belt acts in a way to prevent air moving over the wing (ie the plane is stationary) A will take off, B will not.
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