Helicopters Flight for Beginners shows us the basic of helicopter flight and control. How do helicopters hover? How do they turn? Find out here.
They have existed for only 70 years, yet they are without question one of the most versatile and vital vehicles in the world. They transport world leaders and the critically wounded; they fight forest fires and rescue people trapped in burning buildings; they can deliver huge payloads to areas that no other vehicle can reach.
The helicopter is type of aircraft in which lift is obtained by means of one or more power-driven horizontal propellers called rotors. When the rotor of a helicopter turns it produces reaction torque which tends to make the craft spin also. On most helicopters a small rotor near the tail compensates for this torque. On twin-rotor craft the rotors spin in opposite directions, so their reactions cancel each other. The helicopter is propelled in a given direction by inclining the axis of the main rotor in that direction. The helicopter's speed is limited by the fact that if the blades rotate too fast they will produce compressibility effects on the blade moving forward and stall effects on the rearward moving blade, at the same time.
They have existed for only 70 years, yet they are without question one of the most versatile and vital vehicles in the world. They transport world leaders and the critically wounded; they fight forest fires and rescue people trapped in burning buildings; they can deliver huge payloads to areas that no other vehicle can reach.
The helicopter is type of aircraft in which lift is obtained by means of one or more power-driven horizontal propellers called rotors. When the rotor of a helicopter turns it produces reaction torque which tends to make the craft spin also. On most helicopters a small rotor near the tail compensates for this torque. On twin-rotor craft the rotors spin in opposite directions, so their reactions cancel each other. The helicopter is propelled in a given direction by inclining the axis of the main rotor in that direction. The helicopter's speed is limited by the fact that if the blades rotate too fast they will produce compressibility effects on the blade moving forward and stall effects on the rearward moving blade, at the same time.
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