Power plants – Reaction motor – Method of operation
Patent
1993-02-05
1993-11-09
Casaregola, Louis J.
Power plants
Reaction motor
Method of operation
602263, F02K 306
Patent
active
052591875
ABSTRACT:
A method of operating an aircraft bypass turbofan engine having variable fan outlet guide vanes. In a first embodiment, an engine out condition is sensed, fan rotor speed is repeatedly measured, and vane pitch is adjusted to a predetermined value as a function of the fan rotor speed to generally maximize airflow through the vanes during the engine out condition. In a second embodiment, vane pitch is adjusted to a preselected value as a function of fan rotor speed to generally minimize engine noise during a noise reduction mode of engine operation.
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"TF34 Convertible Engine System Technology Program Engine Design and Test Report", May 1983, by GE for NASA Contract NAS3-22752 vol. I--cover page; pp. 2, 15, 20-22 and 83-86 vol. II--cover page; pp. 20-21.
Concurrently filed U.S. patent application entitled "Aircraft Bypass Turbofan Engine Thrust Reverser" by Donald K. Dunbar et al.
Delaney Bobby R.
Dunbar Donald K.
Hess Paul J.
Casaregola Louis J.
Erickson Douglas E.
General Electric Company
Squillaro Jerome C.
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