The internet at large has been ablaze recently with stories about a radio-controlled scale model of a World War II German King Tiger tank whose job was to drill holes in over-pressurized Space Shuttle ...
In 1956, based on the commercialized CJ805-3 version of the military J79 turbojet then powering the Convair 880, GE began development of an aft fan engine, the J79-X220, later designated CJ-805-23.