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| 3.4. VELOCITY A helicopter's main rotor blades must move through the air at a relatively high speed to produce enough lift to raise the helicopter and keep it in the air. The main rotor can turn at the required takeoff speed while the antitorque rotor holds the fuselage speed at zero. The helicopter can fly forward, backward, or sideward as the pilot desires. It can also remain stationary in the air (hover) with the main rotor blades developing the lift to support the helicopter. |
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Last Updated: January 10, 2009