HELICOPTER

Matthew Hendricks, and Joshua Godly

All about Helicopters

The History of the Helicopter, 1953

This little tiny helicopter was the first helicopter ever invented in china!

This helicopter, when you throw it up in the air and spin it at the same time, then the plane will turn and turn till it comes to the ground.

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This is a big change in the worlds helicopters in china, I mean look at the old one and look at this big change better looking to!!

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A lot of modern day helicopters were made in China!! And even the old spinnig ones to.

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During the past sixty years since their first successful flights, helicopters have matured from unstable, vibrating contraptions that could barely lift the pilot off the ground, into sophisticated machines of extraordinary flying capability. They are able to hover, fly forward, backward and sideward, and perform other desirable maneuvers. Igor Sikorsky lived long enough to have the satisfaction of seeing his vision of a flying machine "that could lift itself vertically from the ground and hover motionless in the air" come true in many more ways than he could have initially imagined

In 1907, about four years after the Wright brothers' first successful powered flights in fixed-wing airplanes at Kitty Hawk in the United States, a French bicycle make named Paul Cornu constructed a vertical flight machine that was reported to have carried a human off the ground for the first time. Boulet (1984) gives a good account of the work. The airframe was very simple, with a rotor at each end. Power was supplied to the rotors by a gasoline motor and belt transmission. Each rotor had two relatively large but low aspect ratio blades set at the periphery of a large spoked wheel. The rotors rotated in opposite directions to cancel torque reaction. A primitive means of control was achieved by placing auxiliary wings in the slipstream below the rotors. The machine was reported to have made several tethered flights of a few seconds at low altitude, but this has never been satisfactorily verified. Certainly, the 24-hp engine used in the machine was hardly powerful enough to have sustained hovering flight out of ground effect.