Accession Number : ADD003302

Title :   Circulation Controlled Rotary Wing Aircraft and Control System Therefor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Danielson,Henry C

Report Date : 09 Nov 1976

Pagination or Media Count : 5

Abstract : The patent relates to a control system for rotary wing aircraft having a circulation controlled rotor. Two axial flow air compressors driven from the engine input shaft provide an air flow which is ducted to the rotor blades through a bifurcated duct and a non-rotating air plenum and released through spanwise slots in the blades. Damping is accomplished by a conically shaped diverter valve in the air plenum and a butterfly valve adjacent the air compressors. Aircraft stability is achieved through a gyro coupled to the rotor shaft which integrates pilot controlled input with rotor cyclic flap moment input.

Descriptors :   *Helicopter rotors, *Control systems, *Patents, Damping, Compressed air, Ducts, Axial flow compressors

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE