Title:
HELICOPTER
Document Type and Number:
Japanese Patent JPS57144197
Kind Code:
A
Abstract:
The helicopter rotor includes a powered blade fold mechanism adapted to have a rotor blade (16) between a spread operational position and a folded position and at least one lock pin (17) to lock the blade (16) in its spread position. The mechanism includes a rotary power source and a mechanical linkage (23, 25) having an over-centre position and adapted so that energisation of the power source in one direction moves the linkage (23, 25) through the over-centre position to withdraw the lock pin (17) and fold the blade (16), and energisation in the other direction moves the blade (16) to the spread position and re-inserts the lock pin (17) automatically as the linkage (23, 25) moves back through its over-centre position. Lock means may be provided to lock the blade in pitch and, in one embodiment particularly adapted for use in an articulated rotor, the lock means includes pitch, flap and lag locks.
Inventors:
KENESU WATOSON
Application Number:
JP773582A
Publication Date:
September 06, 1982
Filing Date:
January 22, 1982
Export Citation:
Assignee:
WESTLAND AIRCRAFT LTD
International Classes:
B64C27/50; (IPC1-7): B64C27/50