Accession Number : AD0715442

Title :   Fire Protection Tests in a Small Fuselage-Mounted Turbojet Engine and Nacelle Installation.

Descriptive Note : Final rept. 1965-1970,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Sommers,Daniel E.

Report Date : NOV 1970

Pagination or Media Count : 62

Abstract : Tests under simulated flight conditions were conducted on a small fuselage-mounted turbojet engine and nacelle installation to investigate the potential explosion and fire hazards and detection and fire control methods. Hot-surface ignition of flammables did not occur during simulated flight operating conditions until a change to the normal nacelle configuration reduced cooling airflow to the hot section of the engine (Zone I) below 0.15 pound per second. The installed detection system did not provide for prompt detection of all fires originated in the lower forward portion of the compressor compartment (Zone II). Both the Zone II fire detection and the Zone I overheat detection system, a portion of which traversed the aft inboard section of Zone II, were sensitive to fires originated in the inboard portion of Zone II. The installed extinguishing system provided rapid extinguishment of all Zone II fires until extensive accumulative damage from fires destroyed the integrity of the zone. Fireproof protection incoporated in the nacelle was very effective in performing its intended function. Most susceptable to damage by fire was the aluminum portion of the nacelle, especially aluminum receptacles for camlock-type fasteners, an aluminum ventilation louver panel in the top aft portion of Zone II, and aluminum ribs, formers, and baffles inside the nacelle in the path of fire. The fire damage to the engine and accessories was insignificant in regard to engine operation. (Author)

Descriptors :   (*TURBOJET ENGINES, FIRE SAFETY), (*AIRCRAFT FIRES, AVIATION SAFETY), FIRE ALARM SYSTEMS, FIRE EXTINGUISHERS, FIRE RESISTANT MATERIALS, FLAME PROPAGATION, JET ENGINE NACELLES, DAMAGE ASSESSMENT, EXPERIMENTAL DATA

Subject Categories : Safety Engineering
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE