Explosion Proofing H-53 Range Extension Fuel Tank.
NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT
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A kit composed of polyurethane reticulated foam, MIL-B-83054, which provides protection against internal explosions from unknown sources that have occurred in the H-53 range extension fuel tanks was devised and tested. Results of tests indicate that the kit arrests an explosion or fire initiated within the tank. A loss of 8.7 of the usable fuel and a gain of 79.5 pounds are attributed to installation of the foam. Author