Ram air turbine with power controller and method of operation

Details Ram air turbine with power controller and method of operation Ram air turbine with power controller and method of operation

1990-06-18

1992-06-16

Bertsch, Richard A.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

416156, 416157R, 417 53, F04B 1702

Patent

active

051220369

ABSTRACT:
An improved RAM air turbine (30) for the generation of emergency power on an airplane is disclosed. The RAM air turbine has an operational range in which reduced power is produced by a power controller (40) at speeds at which stalling of the RAM air turbine would occur under the control of a governor (16) which adjusts the pitch of the blades (12) of the turbine in combination with a pressure regulator (150) controlling the output of pressurized hydraulic fluid from a variable displacement hydraulic pump (19).

REFERENCES:
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patent: 3339639 (1967-09-01), Elmes et al.
patent: 3785754 (1974-01-01), Miller
patent: 4074955 (1978-02-01), Nonnemacher et al.
patent: 4158529 (1979-06-01), Nonnemacher et al.
patent: 4474104 (1984-10-01), Creffield
patent: 4523892 (1985-06-01), Mitchell et al.
patent: 4680931 (1987-07-01), Jacobs
patent: 4711616 (1987-12-01), Tsukahara et al.
patent: 4717095 (1988-01-01), Cohen et al.
patent: 4742976 (1988-05-01), Cohen
Moriss, P. W. "Fluid Power in Aerospace" in Hydraulics & Pneumatics vol. 26 No. 10 Oct. 1973 pp. 87-90.

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