Helicopter

A helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers). Helicopters are classified as rotary-wing aircraft to distinguish them from conventional fixed-wing aircraft. The word helicopter is derived from the Greek words helix (spiral) and pteron (wing). The engine-driven helicopter was invented by the Slovak inventor Jan Bahyl. The first stable, fully-controllable helicopter placed in production was invented by Igor Sikorsky.

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Compared to conventional fixed-wing aircraft, helicopters are much more complex, more expensive to buy and operate, relatively slow, have shorter range and restricted payload. The compensating advantage is maneuverability: helicopters can hover in place, reverse, and above all take off and land vertically. Subject only to refuelling facilities and load/altitude limitations, a helicopter can travel to any location, and land anywhere with a clearing a rotor disk and a half in diameter.

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Aircraft: An aircraft is any machine capable of atmospheric flight....

Lifted: Lifted refer to:...

Rotor: Rotor may refer to:...

Helicopter related Images and Photos (experimental)

The Helicopter	Magnum P.I. - Helicopter	Magnum P.I. - Helicopter	Airwolf - Helicopter
Polly Pocket Helicopter Vehicle	Dog in Helicopter	Air Hogs Havoc Helicopter RC Vehicle Case	Helicopter About to Land Queenstown New Zealand
Coast Guard helicopter Demo at the Seattle Maritime Festival Washington USA	LEGO Creator Mini Helicopter and Dumper Set	A US Military Helicopter Flies Over the Heavily Fortified Green Zone	LEGO Creator 5866 Helicopter Rotor Rescue