Studies of Mechanical Foams for Aircraft Crash Fire Extinguishment.
NAVAL RESEARCH LAB WASHINGTON D C
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A basic investigation has been made toward determining the optimum characteristics of mechanical foams used in aircraft crash fire fighting. The work was started on a laboratory scale gasoline fire and then advanced to a 400 sq. ft. gasoline area using special versatile foam generating equipment and spreading nozzles. An analysis of the fifty-seven test fires is presented using radiation detection apparatus, visual observation, and photographic methods as a basis for evaluation. Foams of expansions 4 to 16 were used holding the rate of water application constant at 0.10 gpmsq. ft. throughout. The factor of foam viscosity or stiffness was also introduced by varying the Drainage Times over a wide range at each expansion. It was concluded that protein-type foams of expansion 10 to 12 were superior in quick extinguishing ability thus permitting early rescue attempts. The burn-back resistance of these foams were also shown superior.
- Safety Engineering