Aircraft fire protection system

A - Human Necessities – 62 – C

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137/67

A62C 35/58 (2006.01)

Patent

CA 1296970

ABSTRACT OF THE DISCLOSURE An aircraft fire protection system which includes a plurali- ty of water spray nozzles spaced along a plurality of longitudi- nal conduits all cross-connected by a plurality of transverse conduits, with "choking" type flow restrictors spaced between groups of spray nozzles to limit flow following conduit rupture, Conduits are connected to the aircraft on-board water supply sys- tem via a pump and non-return valve in series and, additionally or alternately, a plurality of externally mounted self-sealing couplings are interconnected to the conduits, one of which cou- plings should be accessible to fire-fighting personnel for fire tender hose hookup regardless of aircraft orientation and atti- tude. A two-way flow restrictor includes a housing with a cap- tured ball valve element with flutes by-passing opposing seating shoulders for the ball to provide two predetermined "choked" flow rates for normal and reverse flow modes.

552028

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