GuyGadeboisLeRetour wrote:To conclude, I think it's clear: If the plane doesn't move because a conveyor belt compensates for its thrust, then it will never be able to take off.
Isn't this my first solution and what I've been trying to say since before? Except that Flytox made me doubt ... the doubt is the reason not?
Ahmed's bias is to believe that there is no power that goes through the wheels ...
This reasoning only holds because it considers a mass on the wheels zero... and this is only valid just before takeoff! So impossible to reach: the plane remains stationary because the conveyor belt compensates for the full power of the engines ... so it cannot take off.
Place a bicycle on a treadmill:
Without any force applied to the bike, it will move with the mat ... it's good that the treadmill provides power to the bike ...
If you want to keep the bike in place, you will have to apply a constant pushing force (directly or while pedaling) ... the greater the force the faster the belt ... and the greater the mass of the bike. .like on the road
At zero mass, the power transmitted by the belt becomes zero and the bicycle will move forward by applying a thrust to it, but only at zero mass. Zero mass = when takeoff lift is reached which is not possible without reaching a certain speed ...
I'm tired