ALCO 251
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The ALCO 251 is a 4-stroke diesel engine that was developed by the American Locomotive Company to replace its 244 and 539 engines. The 251 was developed to be used in diesel locomotives, as a marine p
ALCO 18-251 V18 engine used as a backup generator at a wastewater plant in Montreal.
Crawler-transporter
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The crawler-transporters, formally known as the Missile Crawler Transporter Facilities, are a pair of tracked vehicles used to transport launch vehicles from NASA's Vehicle Assembly Building along the
ALCO 251
…replaced by 251-engined power generation equipment in 1956. A pair of Alco 251C engines is also used for powering the 6,000,000 lb (2,721,554 kg) NASA Crawler Transporter that transport rockets and their platforms from the Vehicle Assembly Building to the Launch Complex 39. Ultimately a refined and successful design, the…
Crawler Transporter
Crawler-Transporter 2 transporting the Artemis II stack to Launch Complex 39B in January 2026
Crawlerway junction at the LC-39 observation gantry. The right track leads to pad LC-39A (pictured with Space Shuttle Endeavour), while the left track leads to pad LC-39B.
Saturn V, service structure and MLP on top of a crawler