From: "Dave Starr" <DaveStarr@worldnet.att.net> Organization: AT&T WorldNet Services Date: 23 Aug 96 13:44:56 References: 1 2 Followups: 1 2
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Thanks for that C-17 info, Jeremey. I wasn't aware that anything tht modern was using an inert gas system. It's interesting to note that a number of modern AF aircraft, notably many C-130E and H's, use blocks of reticulated poylurethane foam to completelly fill the tankage space. Fuel fills the voids between the foam, when fuel is used, the foam takes up enough of the ullage (air space above the fuel) to make the fuel air mixture too rich to explode. I've seen tapes of actual tests with tracer ammunition fired into foam-filled drop tanks and it's a very effective technique against explosion. Takes up about 7% to 10% of the available tankage, though, and is a b*tch to work with when tank entry is required.