Document Type and Number:
Japanese Patent JPH0159158
Kind Code:
B2
Abstract:
A helicopter having a multiblade main rotor lift unit includes a plurality of pendulus mass units (48,60) mounted to oscillate in the plane of the rotor. The mass units (48,60) are connected to a rotatable shaft (24) which passes through a blade grip (14) for each blade (16). Vibrations generated in the plane of the rotor system are damped by the oscillating pendulums (22) which are tuned to minimize the vibrations in the lift unit.
Inventors:
UIREMU BUROKYUIZEN
TOROI MAIKURU GYAFUEI
MAKANDO MADEI JOGURUKA
UIRIAMU DEIUIDO NEZURIA
TOROI MAIKURU GYAFUEI
MAKANDO MADEI JOGURUKA
UIRIAMU DEIUIDO NEZURIA
Application Number:
JP11580479A
Publication Date:
December 15, 1989
Filing Date:
September 11, 1979
Export Citation:
Assignee:
TEXTRON INC
International Classes:
B64C27/51; B64C27/00; B64C27/625
Next Patent: JPH0159159