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Tilted Cat Head
Administrator
Location: Manhattan, NY
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Quote:
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Originally Posted by Lasereth
Somewhat off topic:
I will never, ever, get in a helicopter. People ask why?? Well let's see: IF IT BREAKS, YOU DIE. If an airplane's engine breaks, you can coast and possibly land. If a car's engine breaks, you coast off to the side of the road. If a boat's engine dies, you just get stuck in the water. If a helicopter's engine breaks, it falls out of the sky and you die. There is no coasting, there is no safety, you're dead. I think it's absurd to get in an aircraft that is suspended in air by a mechanical motor. At least airplanes can fly without an engine, if not slowly towards the ground.
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actually NOT TRUE
Autorotation (helicopter)
Quote:
Autorotation is the state of flight where the main rotor system of a helicopter is being turned by the action of air moving up through the rotor rather than engine power driving the rotor. The term autorotation can be traced back to a period of early development in helicopters between 1915 and 1920 and refers to the rotors turning without the engine.[1]
In normal, powered flight, air is drawn into the main rotor system from above and exhausted downward, but during autorotation, air moves up into the rotor system from below as the helicopter descends. Autorotation is permitted mechanically because of a freewheeling unit, which allows the main rotor to continue turning even if the engine is not running. It is the means by which a helicopter can be landed safely in the event of an engine failure, consequently all helicopters must demonstrate this capability in order to be certified.
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video of a helicopter landing in autorotation
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