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NEW YORK AIRWAYS, INC.
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Vertical Flight

The helicopter operates on a very simple principle. It is forced into the air by the action of its whirling rotor blades which push air downward fast enough to lift the aircraft off the ground. The pilot can raise, lower or keep the helicopter at any height by changing the pitch or "bite" of air taken by the blades as they rotate. This pitch angle is adjusted by the pilot through the movement of a large control lever at his left side. To go up, the pilot lifts up on this control or "collective pitch" lever; to descend, he lowers the lever. When blade pitch is increased, more air is pushed downward and the aircraft rises; conversely, when the pitch is decreased, a lesser amount of air is pushed downward and the aircraft descends. Vertical flight is an inherent helicopter flight capability.

Horizontal Flight

To go forward, the pitch of each blade is changed throughout each revolution so that the total effect of this cyclic pitch change is to product a tilt of the entire rotor. This action forces air backward as well as downward thereby causing horizontal movement or flight as a by-product of lift. Horizontal flight is regulated by a control stick directly in front of the