"The Northrop JB-1 "Bat" was a United States surface-to-surface cruise missile that was a prototype jet-powered flying wing. TheUnited States Army Air Forces MX-543 program was initiated in September 1942 to use US versions of Frank Whittle's jet engine[1](US-named General Electric J31). The Northrop Corporation was contracted in late 1943,[2] and only 10 JB-1 airframes were built.[3] A manned version was towed for the 1st flight on "August 27, 1943", [sic][4] from Rogers Dry Lake;[5] and a glider version was launched from a rocket-propelled sled and crashed in December 1944.[6] An unmanned JB-1 powered by an improvised[verification needed] General Electric B-1 turbojet with a wing span of 28 feet 4 inches (8.64 m) made its 1st flight from Eglin Field's Santa Rosa Island, Florida, on December 7, 1944, and crashed 400 yards from the rail launcher.[7]..."wikipedia
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