Title:
MAIN ROTOR BLADE FOR HELICOPTER AND METHOD OF IMPROVING PERFORMANCE OF ADVANCE FLIGHT THEREOF
Document Type and Number:
Japanese Patent JPS62143798
Kind Code:
A
Abstract:
A helicopter main rotor blade having built-in twist for improved hover performance is provided with a trailing-edge, short span slot near the tip end of the blade for upwardly directing a stream of pressurized air therefrom. The upward ejection of air from the slot untwists the blade, which will enhance the forward flight performance of the blade. A method of modulating the ejection of air from the slot is disclosed for antivibratory control.
Inventors:
EBUAN EI FURADENBAAGU
Application Number:
JP29978386A
Publication Date:
June 27, 1987
Filing Date:
December 16, 1986
Export Citation:
Assignee:
UNITED TECHNOLOGIES CORP
International Classes:
B64C27/32; B64C27/46; B64C27/467; B64C27/51; (IPC1-7): B64C27/46; B64C27/51
Domestic Patent References:
| JP47048151A |
Attorney, Agent or Firm:
Akashi Masatake