||Marion Power Shovel ||Two 2,750 hp (2,050 kW) V16 Alco diesel
engines. Two 1,006 hp (750 kW) generators, driven by two 1,065
hp (794 kW) engines, are used for jacking, steering, lighting,
and ventilating. ||16 traction motors, powered by four 1,341 hp
(1,000 kW) generators ||131 ft (40 m) ||114 ft (35 m)
||Adjustable, 20 to 26 ft (6 to 8 m) ||2,721 t (2,721,000 kg;
6,000,000 lb) The crawler-transporters are a pair of tracked
vehicles used to transport spacecraft from NASA's Vehicle
Assembly Building (VAB) along the Crawlerway to Launch Complex
39. They were originally used to transport the Saturn IB and
Saturn V rockets during the Apollo, Skylab and Apollo–Soyuz
programs. They were then used to transport Space Shuttles from
1981 to 2011. The crawler-transporters carry vehicles on the
Mobile Launcher Platform, and after each launch return to the
pad to take the platform back to the VAB. The two crawler-
transporters were designed and built by Marion Power Shovel
(later Caterpillar, Inc.) using components desi