Title:
WING TYPE BLADE
Document Type and Number:
Japanese Patent JPS5826699
Kind Code:
A
Abstract:
An improved airfoil blade for aircraft propellers and the like which exhibits high aerodynamic performance and low far and near field noise levels at a minimum weight is provided with a novel high lift and high lift to drag cross-sectional airfoil shape characterized by a blunt, generally parabolic leading edge portion (10) which fairs into a pressure surface (15) characterized by a leading convex portion (20). For thickness ratios less than approximately 0.15, the pressure surface includes a concave trailing portion (25) at one end thereof, fairing into the leading convex portion (20) and at the other end thereof, terminating at a blunt trailing edge (35). The leading edge portion also fairs into a suction surface (30) which is convex along substantially the entire length thereof to the blade trailing edge.
More Like This:
| JPH0627499 | [Name of device] Air propeller |
| WO/1981/002557 | IMPROVEMENTS IN AEROFOILS |
| WO/1997/043175 | LIFTING-FUSELAGE/WING AIRCRAFT HAVING LOW INDUCED DRAG |
Inventors:
KAARU ROOBATSUKU
HARII SUTEFUEN WAINOOSUKII
HARII SUTEFUEN WAINOOSUKII
Application Number:
JP12950682A
Publication Date:
February 17, 1983
Filing Date:
July 23, 1982
Export Citation:
Assignee:
UNITED TECHNOLOGIES CORP
International Classes:
B64C3/14; B64C11/18; F01D5/14; B63H1/26; (IPC1-7): B63H1/26; B64C3/14; B64C11/18
Domestic Patent References:
| JPS5695799A | 1981-08-03 |
Attorney, Agent or Firm:
Akashi Masatake