Optimum speed rotor

Details Optimum speed rotor Optimum speed rotor

1999-02-19

1999-12-28

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Impeller rotation speed responsive

416 43, 416 36, 416 31, 416223R, 416DIG5, 416 1, B63H 128

Patent

active

060072989

ABSTRACT:
A variable speed helicopter rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor and thereby resulting in helicopter performance efficiency improvements, reduction in noise, and improvements in rotor, helicopter transmission and engine life. The system and method provide for an increase in helicopter endurance and. The system and method also provide a substantial improvement in helicopter performance during take-off, hover and maneuver.

REFERENCES:
patent: 3960348 (1976-06-01), Fowler et al.
patent: 4115755 (1978-09-01), Cotton
patent: 4427344 (1984-01-01), Perry
patent: 4632337 (1986-12-01), Moore
patent: 4783023 (1988-11-01), Jupe
Proctor, Mitsubishi Test Civil Markets With All-Japanese MH-2000 (2 pages).
Attlfellner, Eurocopter EC 135 Qualification For The Market, pp. 37.1-37.9.
Lockheed Model 286; Lockheed Cheyenne AH-56SA (1page).

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