Patents Assigned to Westland Aircraft, Ltd.
  • Helicopter rotor blade
    Patent number: 4427344
    Abstract: A helicopter rotor blade is disclosed having a root end for attachment to a rotor head, a tip end defining the end of the blade fartherest from the root end with a central portion of aerofoil section extending between and attached to the root end and the tip end to define a rotor radius wherein an outboard region of the central portion has a negative basic pitching moment coefficient of absolute value not less than 0.02 and an inboard region having a basic pitching moment coefficient more positive than that of the outboard region.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: January 24, 1984
    Assignee: Westland Aircraft, Ltd.
    Inventor: Frederick J. Perry