Analog mixer to vary helicopter rotor phase angle in flight

Details Analog mixer to vary helicopter rotor phase angle in flight Analog mixer to vary helicopter rotor phase angle in flight

1975-11-13

1977-06-07

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Responsive to relative working fluid velocity

416114, 416115, 416127, B64C 2780

Patent

active

040279995

ABSTRACT:
An analog mixer for a helicopter rotor control system mounted for tilting motion about a variable tilt axis and connected to the rotor control swashplate to cause synchronous tilting and including means to impart tilt generating control inputs to the analog mixer, and means to vary the position of the analog mixer tilt axis as a function of helicopter speed to thereby vary the phase angle of the helicopter rotor without imparting control inputs to the rotor control swashplate.

REFERENCES:
patent: 2546881 (1951-03-01), Avery
patent: 2748876 (1956-06-01), Daland et al.
patent: 3120276 (1964-02-01), Culver et al.
patent: 3146970 (1964-09-01), Girard
patent: 3199601 (1965-08-01), Dean et al.
patent: 3409249 (1968-11-01), Bergquist et al.
patent: 3521971 (1970-07-01), Cheney
patent: 3570786 (1971-03-01), Lewis
patent: 3620488 (1971-11-01), Miller
patent: 3799695 (1974-03-01), Yamakawa

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