Patent ID: 7946526
Filing Date: 2011-05-24
Classification: A63H,B64C

Abstract:
1. A coaxial rotary-wing apparatus comprising: at least two sets of lifting blades connected to a main coaxial drive shaft; primary drive means connected to said main coaxial drive shaft for driving the at least two sets of lifting blades at the same angular velocity, a first set of said lifting blades being driven by said primary drive means in a first direction of rotation, and a second set of said lifting blades being driven by said primary drive means in a second direction of rotation opposite to said first direction; the at least two sets of lifting blades being located one above the other, wherein the center of gravity of the coaxial rotary-wing apparatus is positioned lower than the at least two sets of lifting blades; a plurality of auxiliary drive means, comprising propeller drives for driving the coaxial rotary-wing apparatus in at least forwards and backwards directions while in flight; and control means for controlling said primary and auxiliary drive means, said control means comprising differential left/right steering and forwards/backwards steering means for providing commands to each of said auxiliary drive means to control power and rotational direction of each of said auxiliary drive means for causing said rotary wing apparatus to move in forwards and backwards directions and to perform yawing motions while in normal and high speed forwards and backwards flight.