United States Army #1843

This Fairbanks-Morse H12-44 locomotive was part of a group of locomotives built in 1953 for the United States Army at a cost of $224,700 each. It is a 1200 horsepower 120 ton yard switcher. In 1944, Fairbanks-Morse entered the United States railroad locomotive market trading on their excellent reputation in diesel power plants for marine applications. Their locomotives used an unorthodox opposed-piston design engine. During the next nineteen years, F-M achieved limited acceptance and rated a distant fourth place in market share during a period when all major American railroads were replacing their steam locomotives with diesels. F-M left the locomotive market in 1963.

This locomotive was used most recently at the Seneca Army depot in Romulus, New York where it handled 30 to 100 cars per week on 42 miles of track at the base. In 1993, it was declared surplus by the Army, and a group of museum members purchased the unit for the Chapter through the Federal Property Assistance program. It arrived at the museum in May 1993. It is in operating condition and is used year round at the museum as the locomotive uses antifreeze and has a block heater for winter use.

Many of the 1843's sister locomotives have been saved and are preserved in other museums throughout the country including the other Seneca Army depot engine #1844 at the National Transportation Museum in Kirkwood, MO.

Technical Data

  • Built January 1953
  • Fairbanks-Morse Beloit, Wisconsin
  • Builder's number 12L667
  • 1200 horsepower
  • 6 cylinder opposed piston engine


  • USA #1843 Getting Underway
    We find our Fairbanks-Morse H12-44, USA #1843, idling and waiting to make a move. With two blasts of its horn and with the ringing of the bell, the 1843 slowly pulls a string of cars out of one of sidings at the R&GV Railroad Museum.
  • USA #1843 Climbing the Hill
    USA #1843, our FM H12-44, climbs the hill out of the Industry yard trailing caboose, Erie C254. All is quiet with just the birds chirping until you start to hear 1843 pulling up the hill and going past; signaling an acknowledgement as it goes by.

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