The U.S. Air Force and Pratt & Whitney ground-tested the first uncooled hydrocarbon-fueled scramjet engine at simulated Mach 4.5–6.5 in 2001. This collaboration also demonstrated in 2003 a scramjet made from nickel-based alloys and cooled by its JP7 jet fuel. The 2003 engine has the potential to power future missiles, aircraft, and access-to-space vehicles. Last year, the Defense Advanced Research Projects Agency, U.S. Navy, Boeing, Aerojet, and Johns Hopkins University also ground-tested a scramjet engine, which was constructed primarily from nickel alloys, powered by JP10 jet fuel, and intended exclusively for hypersonic missiles.
so it would seem that scram jets use or can use j-p7 fuel .
[edit on 4-6-2006 by buckaroo]