AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

July 17-18, 2001International Aircraft Systems Fire

Protection Working GroupWilson, NC

Full Scale GBI Testingwith B747 SP

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Background• Focus of the Testing is to Better Quantify the

Parameters that Effect the Benefit of GBI – Wind and Weather

– Equipment Usage

– Cross Venting

• Study Manifold Design

• Study the Cost and Benefit of Potential OBIGG Systems.

• Platform to Examine Cross Flow Reduction Methods

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________Boeing 747 SP

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Work Completed• Wrote Research Plan and Testing Safety Plan

• Have a Preliminary Schedule– Start Testing 8-6-01

– Test for 12 Weeks

• Obtained Aircraft– Located Preliminary Parking Spot

– Have Most Support Equipment Required

• Began Installing Testing Control Center and Instrumentation.

• CWT has Been Opened and Cleaned and is Ready to be Modified

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Instrumentation Planned• Gas Sample Tubing

– Sample Oxygen at Eight Locations in the CWT

– Sample THC at Any Two of Those Locations

– Sample Oxygen in Surge Tanks, Dry Bay

• Thermocouples– 8 in Fuel

– 8 in Ullage

– 16 Mounted on Interior Wall Surfaces

• Plan to Measure Pressure in Tank Bays

• Record NEA Volume Flow and Oxygen Concentration

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

747 SP Gas Sample Locations

Dry Bay

1

3

5 6

2

4

7 8

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Potential Instrumentation Improvements• Measure NEA Flow and Purity Directly

• THC Measurements at Surge Tank

• Wind Speed and Direction

• ?

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Pending Work• Modify CWT

– NEA Delivery System

– Thermocouples

– Sample Tubing

• Complete Installation of DAS and Control Room

• Get NEA Source on Site

• Do End-to-End Signal Check

AAR-422 Fire Safety R&D

Full-Scale Ground-Based Inerting___________________________________

Full Scale GBI System Diagram

GroundHeat/HVAC

GroundPower

Movable Stairway

Ground Based NEA

Supply

NEA Hose Reel

Tug

Tow Bar