zlacker

>>qqqqqu+(OP)
Flight. Apparently "air flows faster on the top side of the wing, lowering the pressure" is an incomplete explanation; I even heard we don't completely understand why it works (?!?).

>>tomp+fl
It directs air moving horizontally downwards, by conservation of momentum the wing must get additional upwards momentum, called lift.

>>contra+Cn
That can't be the explanation, otherwise wings wouldn't need to be curved - flat wings could fly, as long as they're tilted to redirect the air.

>>tomp+Qn
That is, in fact, true. Planes can fly with symmetrical wings, including flat wings, and even with upside-down wings, as is easily demonstrated by observing stunt planes actually flying upside-down--in all cases, as long as they are appropriately tilted to redirect the air. Most purpose-built stunt planes even actually have symmetrically-curved wings, because the reduction in right-way-up aerodynamic performance is made up for by the increase in inverted performance.