tanks to be pressurized, making self-sealing difficult. Newer technologies have brought advances like inert foam-filled tanks to prevent detonation. This foam is an open cell foam that effectively divides the gas space above the remaining fuel into thousands of small spaces, none of which contain sufficient vapour to support combustion. This foam also serves to reduce fuel slosh. Major manufacturers of this technology include Hutchinson, Amfuel (ex. Zodiac) (formerly Firestone), Meggitt (formerly Goodyear), Robertson Fuel Systems, GKN USA, FPT Industries, and Safran Aerosystems. FPT is now part of GKN. For military use, tanks are qualified to MIL-DTL-27422 (includes crashworthiness requirements) or MIL-DTL-5578 (non-crashworthy). An aircraft fuel tank sometimes consists of several interconnected fuel cells. The interconnecting hoses are typically also self-sealing. In addition to military aircraft, some military vehicles feature self-sealing fuel tanks, such as the United States Marine Corps' LAV-AT armored vehicles. A notable example of a non-military vehicle that uses self-sealing fuel tanks is the U.S. presidential state car, having used them since John F. Kennedy's SS-100-X. Self-sealing fuel tanks using military technology are also required in some motorsport categories. References Notes Sources Dunn, Richard L. (2011). Exploding Fuel Tanks - Saga of technology that changed the course of the Pacific air war. Gustin, Emmanuel (1999). Fighter Armour. Retrieved Aug. 4, 2005. "The Story of the Self-Sealing Tank". (Feb. 1946). US Naval Institute Proceedings, pp. 205. External links James A Merrill receiving citation from President Roosevelt (1942) Installation of a Self-Sealing Materials Systems in a C-130 Integral Fuel Tank Wing - DTIC Popular Science, November 1941 Lining Will Seal Bullet Holes In Bombers Fuel System see bottom half of page Gunfire Qualification Test of Self-Sealing Fuel Cells Self-sealing Fuel Tank Demonstration Aircraft fuel system components Fuel containers Military aviation