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A Combined Water-Bromotrifluoromethane Crash-Fire Protection System for a T-56 Turbopropeller EngineA crash-fire protection system is described which will suppress the ignition of crash-spilled fuel that may be ingested by a T-56 turbo-propeller engine. This system includes means for rapidly extinguishing the combustor flame, means for cooling and inerting with water the hot engine parts likely to ignite engine ingested fuel, and means for blanketing with bromotrifluoromethane massive metal parts that may reheat after the engine stops rotating. Combustion-chamber flames were rapidly extinguished at the engine fuel nozzles by a fuel shutoff and drain valve. Hot engine parts were inerted and cooled by 42 pounds of water discharged at seven engine stations. Massive metal parts that could reheat were inerted with 10 pounds of bromotrifluoromethane discharged at two engine stations. Performance trials of the crash-fire protection system were conducted by bringing the engine up to takeoff temperature, actuating the crash-fire protection system, and then spraying fuel into the engine to simulate crash-ingested fuel. No fires occurred during these trials, although fuel was sprayed into the engine from 0.3 second to 15 minutes after actuating the crash-fire protection system.
Document ID
19980227419
Acquisition Source
Headquarters
Document Type
Other - NASA Technical Note (TN)
Authors
Campbell, John A.
(NASA Lewis Research Center Cleveland, OH United States)
Busch, Arthur M.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1959
Subject Category
Air Transportation And Safety
Report/Patent Number
E-308
NASA-TN-D-28
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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