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How planes fly: what really keeps them in the air

The way many schools explain lift, with air racing over the curved top of a wing to meet the air below, is wrong. NASA even keeps a page that says so. Learn how a wing really holds a plane up: the air it throws down, the drop in air pressure above it, and Bernoulli's principle. Then follow a real flight: what happens when the engines stop, why planes wait on an empty runway, why heat makes the takeoff run longer, what a stall is, and why the wing changes shape to land.