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Patent Searching and Data


Title:
UNMANNED FLIGHT VEHICLE INCLUDING COUNTER ROTATING ROTOR POSITIONED WITHIN TOROIDAL SHROUD AND OPERABLE TO PROVIDE ALL REQUIRED VEHICLE FLIGHT CONTROL
Document Type and Number:
Japanese Patent JP04231290
Kind Code:
A
Abstract:

PURPOSE: To improve control performance by applying a corrective pitch and a cyclic pitch to rotor blades, generating moment by means of pitch changes of the blades, and controlling behaviors via the cooperation with the moment from air streams.

CONSTITUTION: When both the corrective pitch and cyclic pitch of counter- rotating rotors 16, 18 are controlled, nose-up moment MS as shown in the figure is generated in the lift or moment generating characteristic of a fuselage 12. When the air inflow quantity becomes maximum at the O-position or rear position of the duct 54 of the fuselage 12 by cyclic pitch control, nose-down moment MR countering the nose-up moment MS is generated, and it cooperates with the nose-down moment MR generated by the rotor 16. A relation shown in the figure exists among the cyclic pitch angle, nose-up moment MS and nose-down moment MR, and the behaviors of a flight vehicle are controlled by the control of the cyclic pitch angle.


Inventors:
Cycon, James P.
Rosen, Kenneth M.
Whyte, Andrew C.
Application Number:
JP1991000140944
Publication Date:
August 20, 1992
Filing Date:
May 16, 1991
Export Citation:
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Assignee:
UNITED TECHNOL CORP
International Classes:
B64C29/00; B64C27/10; B64C27/20; B64C39/02; B64C39/06; (IPC1-7): B64C27/20; B64C39/06