J-58 Engine Starter Cart
This engine starter cart was developed specifically for the SR-71 family of aircraft. It used two Buick V-8 racing car engines, linked together through a common gear box, to deliver power to the starter drive shaft of the aircraft engine. More than 600 hp from the two V-8 engines was required to “spool up” the J-58 to about 3,200 rpm for starting. (U.S. Air Force photo)