Composite Fuselage Firefighting Issues International Aircraft Materials Fire Test Working Group Naples, FL 4 Mar 2009 By Doug Dierdorf, Ph.D. Principle.

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Composite Fuselage Firefighting Issues International Aircraft Materials Fire Test Working Group Naples, FL 4 Mar 2009 By Doug Dierdorf, Ph.D. Principle Scientist Applied Research Associates, Inc

Expanding the Realm of Possibility Extinguishing Burning Composite OBJECTIVE: Determine the best method and agents to quickly and efficiently extinguish a variety of aircraft composites. APPROACH: Evaluate existing agents (Class A Foam, AFFF, heat absorbing gels) and applications techniques (such as UHP) to identify the most effective method to extinguish fires involving large amounts of composites. Use standardized composite samples of carbon/epoxy carbon BMI composites Use standard sized fire Orient the composites in both horizontal and vertical configurations Evaluating the effects of wicking fuel into delaminated composite layers.

Expanding the Realm of Possibility Define Test Fire Key Features Reproducible Cost Effective Realistic “Robust” Fire Difficult to Suppress Susceptible to reignition Test of Agents and Application Technologies Not a test of Material! OBJECTIVE: Determine the best method and agents to quickly and efficiently extinguish a variety of aircraft composites. APPROACH: Evaluate existing agents (Class A Foam, AFFF, heat absorbing gels) and applications techniques (such as UHP) to identify the most effective method to extinguish fires involving large amounts of composites. Use standardized composite samples of carbon/epoxy carbon BMI composites Use standard sized fire Orient the composites in both horizontal and vertical configurations Evaluating the effects of wicking fuel into delaminated composite layers.

Expanding the Realm of Possibility Pre-Burn Defined by response time How soon is the first truck on scene and fighting fires Three to Five Minutes

Expanding the Realm of Possibility Composite Burn Survivable Crashes Rescue Crews must be able to enter aircraft safely Interior fires must be extinguished and reignition prevented

Expanding the Realm of Possibility Composite Extinguished Assess Damage to Composite Residual strength Hazard to rescue crew and disabled passenger

Expanding the Realm of Possibility 1/8 - 3/16” 3’ 2’ 6” ½ - ¾” Initial Sample Concept Custom Fabricated Sample Simulate Aircraft Component Cost estimate $6,000 to $7, units

Expanding the Realm of Possibility Low Cost Components Sheets, rods, tubes and gussets Fabricate Structures Control Loading Control Shape Effect of Adhesive? ▲ ▲ ▲ ▲ Built-up Stringer Four Point Bend Loading

Expanding the Realm of Possibility 2’ X 3’ X 1/8” Carbon/Epoxy Sheet Pressure Bars for Four Point Bending Load Component Based Design Preliminary Concept Drawing