Rotor, especially for rotary wing aircraft

Details Rotor, especially for rotary wing aircraft Rotor, especially for rotary wing aircraft

1986-09-02

1987-09-01

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Nonmetallic resilient mounting

416141, B64C 2733

Patent

active

046906150

ABSTRACT:
A rotor, especially for rotary wing aircraft, has a rotor hub (1) with one r more torsionally stiff rotor hub arms (1.1) projecting radially outwardly. A rotor blade (2) having a blade root (2.1), a blade wing section (2.3), and a torsionally flexible blade neck (2.2) is attached by bolts (3) to each rotor hub arm (1.1). A torsionally rigid blade angle control sleeve (5) extends without contact along each blade neck (2.2) and is rigidly connected at its radially outer end to the blade wing section (2.3) and is movably connected at the radially inner end to the blade root (2.1). In order to isolate the blade control from any blade flapping movements, and to reduce the distance between the flapping hinge point and the rotor hub (1), the rotor hub arm (1.1) is flat in a direction perpendicular to the blade rotation plane and is more flexible to blade flapping movements than the blade neck (2.2) is. The blade root (2.1) is in the form of a yoke or fork for attachment to the rotor hub arm (1.1), whereby the two shanks or prongs (2.1.1) of the yoke or fork form the base for the movable support of the blade control sleeve (5).

REFERENCES:
patent: 4012169 (1977-03-01), Mouille et al.
patent: 4129403 (1978-12-01), Watson
patent: 4222709 (1980-09-01), Mouille
patent: 4273511 (1981-06-01), Mouille et al.
patent: 4547127 (1985-10-01), Frommlet et al.

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