330-PS-3097 (USN 708767):  New Navy Foam Fire-Fighting Truck.   Mounted on a conventional crash truck, a new aircraft crash fire-extinguishing system, developed by the Naval Research Laboratory, under the sponsorship of the Bureau of Aeronautics, produces twice as much foam as previous systems.   It can cover a burning airplane with approximately 15,000 gallons of a thick sticky fire-smothering blanket of foam supplied by two pumps on the truck.   The improved system is the result of the new designs in nozzles and pumps with two 150-hp engines to power two separate foam-making systems.  Air, water, and foam concentrate are whipped together in egg-beater fashion, and the resulting micro-bubbled foam is fleeced out through two distributing nozzles on the front fenders of the truck. These nozzles are pivoted and continuously adjustable by the operator from his position on a “bridge” above and behind the cab of the truck.  By pushing a button the operator can widen his foam streams, operating a protective cone of 7,000 gallons of a foam a minute.  Tanks hold 1200 gallons of water and 80 gallons of foam concentrate sufficiently for two minutes of continuous, high-capacity operation, November 10, 1952.  (5/5/2015).
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