Partial span inlet guide vane for cross-connected engines

Details Partial span inlet guide vane for cross-connected engines Partial span inlet guide vane for cross-connected engines

1978-05-01

1981-03-10

Casaregola, Louis J.

Power plants

Reaction motor

Interrelated reaction motors

60226B, 244 55, F02K 304, F02K 3075

Patent

active

042546192

ABSTRACT:
A pair of turbofan engines are cross connected such that during normal-mode operation horsepower can be shared by the respective cores, and when one engine core becomes inoperative the fan of that engine can be driven by the turbine of the operative engine to thereby maintain a substantial thrust output. In order to balance the respective thrust outputs, variable inlet guide vanes are controlled to decrease the fan mass flow in the operative engine and increase the fan mass flow in the inoperative engine. The variable inlet guide vanes are so constructed as to only partially span the fan duct so as to not appreciably affect the airflow to the core when the inlet guide vane angle setting is altered to allow the core to thereby retain a high level of supercharging during this operational period of maximum power demand.

REFERENCES:
patent: 2503006 (1950-04-01), Stalker
patent: 3449914 (1969-06-01), Brown
patent: 3472321 (1969-10-01), Ellinger
patent: 3729957 (1973-05-01), Petrie et al.
patent: 4112677 (1978-09-01), Kasmarik
patent: 4116405 (1978-09-01), Bacchi et al.

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