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How does a helicopter create lift without moving forward at a fast pace?
Helicopters create lift with their rotors. Instead of the entire aircraft having to move forward through the air really fast, like an airplane, a helicopter spins its rotors really fast. It's rotors are airfoil shaped, just like an airplane wing. And like an airplane wing, the spinning rotors are shaped in such a way that they create a pressure difference - lower air pressure on top and higher air pressure on the bottom. This pressure difference creates lift and pushes the helicopter up into the air.