OBIGGS Utilization In Inaccessible Areas On A Wide Body Aircraft

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OBIGGS Utilization In Inaccessible Areas On A
Wide Body Aircraft
International Aircraft Systems Fire Protection
Working GroupAtlantic City, NJ
November 1, 2005
Steve Summer
Project Engineer
Federal Aviation AdministrationFire Safety
Branch
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OBJECTIVES

• Design and install an NEA distribution system for
  fire protection of the overhead area of the 747SP
  test article
• Examine the effect of various conditions on the
  ability of the OBIGGS to successfully protect the
  overhead area
• Bleed air pressure
• OBIGGS feed pressure
• OBIGGS back pressure
• Permeate pressure (altitude)
• Ventilation
• Etc.

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TEST ARTICLE

• 747SP previously utilized in fuel tank inerting
  research efforts
• OBIGGS installed in the empty pack bay utilizing
  6 ASMs
• Current instrumentation allows for monitoring
  oxygen at 12 locations

• NEA flow and purity also measured as well as
  various system pressures

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TEST CONFIGURATION
Current Test Section (STA 1241)
From OBIGGS
From OBIGGS
Vacuum Source
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CURRENT TEST SECTION

• Located at approximately STA 1241
• Approximately 20 ft. wide, 5 ft. tall at center
• Cross-sectional area of approximately 42 ft2

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CURRENT STATUS

• NEA line from OBIGGS is plumbed to overhead area
• 8 oxygen sample lines located in overhead area
  (ability to add 4 more)
• Ready to begin preliminary testing with one NEA
  deposit location to examine NEA spread rates
• Next step is to use that data to develop
  distribution system