HELICOPTER Russian patent published in 2008 - IPC B64C27/06 B64C11/18 

FIELD: transport.

SUBSTANCE: invention relates to rotorcrafts. The helicopter contains an airframe, an engine, a rotor and a tail rotor. The shape of the front and rear blade edges of the rotor and tail rotor represent two parabolas tangent to the circumference. The shape of lower and upper blade edges of the rotor and tail rotor is formed by intersection of two parabolas. The rotor and tail rotor blade ends are bent at the angle β≥60°. The rear edge of every blade incorporates a stabilising plane. A truncated paraboloid of revolution is arranged above the rotor blades.

EFFECT: higher lift of the helicopter.

2 cl, 4 dwg