HELICOPTER MAIN ROTOR BLADE BALANCE WEIGHT RETENTION ASSEMBLY

WIPO Patent Application WO2003011689

A9

A helicopter main rotor blade balance weight retention system and assembly having a base plate (105), at least one support post (107) integral with the base plate and extending out perpendicularly from the base plate, a plurality of balance weights (109), a retaining nut plate (111), and one or more fastening bolts (113) for securing the balance weights to the base plate, and the base plate to the rotor blade. The balance weights (109) include apertures (117, 119) through which the support posts and the fastening bolts pass. The apertures through which the support posts pass are dimensioned such that the a snug fit is formed between the support posts and the balance weight; but the apertures through which the fastening bolts pass are dimensioned such that the threaded portions of the fastening bolts are not subjected to any shear loads from the balance weights due to the centrifugal force generated by the rotating rotor blades. The weight retention assembly is installed into pockets in the blade tip.

WO/2008/079431	ROTARY WING AIRCRAFT ROTATING MACHINERY VIBRATION CONTROL SYSTEM
WO/2002/002936	METHOD FOR DETERMINING THE ANGLE OF A ROTOR BLADE PERTAINING TO A WIND ENERGY INSTALLATION
WO/1997/022079	METHOD AND APPARATUS FOR CONTROLLING AN ELECTRONIC DEVICE DURING TAKE-OFF AND LANDING OF AN AIRCRAFT

KUHNS NORMAN (US)
SEHGAL AJAY (US)
POWELL ERNEST A (US)

PCT/US2002/024729

October 30, 2003

August 02, 2002

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BELL HELICOPTER TEXTRON INC (US)
KUHNS NORMAN (US)
SEHGAL AJAY (US)
POWELL ERNEST A (US)

B64C27/00; B64C27/46; B64C27/473; (IPC1-7): B64C27/51

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