Originally Posted by /^Blackbacca^\
not necessarily, a conveyor of that size, moving at the speeds required to keep a jet on the ground in this manner will be moving a shit load of air in the direction required to genrate lift against the wings. as the lift increases, the effect of the conveyor on the airplane will decrease proportionally.
Doubtful, the kinematic viscosity for most gases is very low, so you're not going to get enough shear flow to build up velocity higher than maybe 1-2" above ground. Even if there is some entrainment, it's not going to be very fast.
As far as the plane lifting off, given that the conveyor moves exactly opposite the aircraft's speed, meaning that the plane's airspeed velocity is 0, the wings will not generate lift.