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FULL-SCALE AIRCRAFT CABIN AND EE-BAY TEST RESULTS FROM GREENWOOD, MS Presented 29 August 2000 to: INTERNATIONAL AIRCRAFT SYSTEMS FIRE PROTECTION WORKING GROUP. Joe Wolfe Naval Aviation Systems Team (732) 323-7343. 737-200 TEST AIRCRAFT.

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joe wolfe naval aviation systems team 732 323 7343

FULL-SCALE AIRCRAFT CABIN AND EE-BAY TEST RESULTS FROM GREENWOOD, MSPresented 29 August 2000 to:INTERNATIONAL AIRCRAFT SYSTEMS FIRE PROTECTIONWORKING GROUP

Joe Wolfe

Naval Aviation Systems Team

(732) 323-7343

737 200 test aircraft
737-200 TEST AIRCRAFT

Greenwood, MS test aircraft and test equipment shown

Aircraft interior and instrumentation shown

cabin fire suppression
CABIN FIRE SUPPRESSION

Backside view and side view of stow bin

Aircraft constraints followed for low pressure nozzle installation.

cabin fire suppression4
CABIN FIRE SUPPRESSION

No interference with aircraft systems for low pressure installation

View between the stow bins

ceiling wire arc threat
CEILING WIRE ARC THREAT

Wire bundles being set in place for wire arc fire above the ceilingtest condition

ceiling wire arc threat6
CEILING WIRE ARC THREAT

Wire arc event after low pressure water mist application.

No arcing detected after mist activation.

aerosol generators
AEROSOL GENERATORS
  • Large surface area for extinguishing actions
  • Small amount required for reliable extinguishing
  • Gas-like 3 dimensional distribution
  • Long suspension times – micron size particles
  • Dual Extinguishing Actions
    • Primary:
      • Chemical - Removal of chain carriers
    • Secondary:
      • Physical - Heat absorption
737 200 ee bay suppression9
737-200 EE-BAY SUPPRESSION

Electrically arced cable bundles above fuel source.

Pyrogen aerosol generator installed in the EE-bay.

conclusions
CONCLUSIONS
  • The twin fluid low pressure nozzles proved highly reliable and maintenance free.
  • The installation of the twin fluid low pressure nozzles can be accomplished with minimal aircraft interior configuration changes.
    • Low pressures allow for lightweight, flexible material
  • The twin fluid low pressure nozzles proved highly effective in suppressing and extinguishing fires during all threat scenarios.
  • The Pyrogen Aerosol Generators were highly effective in extinguishing fires in the EE-Bay.
recommendations
RECOMMENDATIONS
  • It is recommended that this test series be repeated with inclusion of airline industry, FAA and NTSB.
  • It is recommended that a subsequent test series be structured to reflect the operating parameters of a production system.
    • Pressures should start at 0 psi and ramp up to operating pressure.
    • Prototype systems should comply with standard aircraft system design.
    • In-flight airflow should be simulated to max. possible.