Changeover valve

Details Changeover valve Changeover valve

1992-11-27

1994-06-07

Bertsch, Richard A.

Power plants

Reaction motor

Interrelated reaction motors

60262, 60 3907, F02K 138

Patent

active

053178670

ABSTRACT:
A changeover valve for a tandem fan type of engine is located in a duct between fan stages at either end. The valve arrangement has a butterfly flap valve to selectively obstruct flow along the cut, a drop-down chute to eject front fan flow and secondary inlet means to induct air to the second fan stage to supply the core engine. The secondary inlet means comprises drop-in doors hinged to pivot into the duct behind the flap valve. A tertiary airflow in a space defined by the duct and an engine nacelle is admitted to the region at the second fan entry face which is shadowed by the secondary inlet doors.

REFERENCES:
patent: 3854286 (1974-12-01), Klees
patent: 4038818 (1977-08-01), Snell
patent: 4086761 (1978-05-01), Schaut et al.
patent: 4587803 (1986-05-01), Nightingale et al.
patent: 4979363 (1990-12-01), Hitchcock et al.
patent: 5129225 (1992-07-01), Tonks

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