Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member
Patent
1998-12-18
2000-02-01
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Radially extensible or retractible rotor working member
416 88, 416 89, 416170R, 416169R, 244 8, 244 1723, 244 56, 244 39, 475296, 475269, 475302, B64C 1104, B64C 2772, F01D 700, F03B 314
Patent
active
060195789
ABSTRACT:
A rotor blade actuation system is disclosed for controlling extension and retraction of an outboard blade section of a rotor blade by varying the speed and direction of rotation between a main rotor shaft and a blade actuation shaft. The rotor blade actuation system includes a drive gear on the main rotor shaft and a blade actuation drive gear on the blade actuation drive shaft. A primary drive unit is engaged with and transmits rotary motion from the main rotor shaft to the blade actuation shaft. The primary drive unit includes an input gear engaged with the drive gear. A primary drive is engaged with the drive gear through an input gear and a master clutch. An output drive is engaged with the blade actuation drive gear. A forward clutch controls engagement of a forward planetary gearset with the primary drive and the output drive. The engagement of the forward planetary gearset causes the blade actuation shaft to rotate in the same direction as the rotation of the main rotor shaft. A reverse clutch controls engagement of a reverse planetary gearset with the primary drive and the output drive. The engagement of the reverse planetary gearset with the primary drive and the output drive causes the blade actuation shaft to rotate in the opposite direction from the rotation of the main rotor shaft. A rotor blade actuation control unit controls engagement and disengagement of the forward and reverse clutches.
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Fitzgerald Paul C.
Hager Lee N.
Barton Rhonda
Look Edward K.
Sikorsky Aircraft Corporation
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