FM H12-44 #1850

Fairbanks-Morse 1850Fairbanks-Morse (FM) No. 1850 is a H12-44 locomotive built in January and February of 1953 as part of a group of 20 locomotives. It is a 1200 horsepower 120-ton yard switcher. The locomotive was delivered with the Fairbanks Morse standard 2-cycle 38D-6 opposed piston prime mover capable of producing 1,200 horsepower via a B-B truck setup (meaning two axles per truck). Each of the six cylinders was 8.125 x 10 inches in size. This combination allowed for a top speed of 60 mpg and a tractive effort of 40,440 lbf.

The model designation, H12-44 is easily broken down:

  • The “H” stood for Hood unit
  • “12” was for 1,200 horsepower
  • Each 4 meant four axles and four traction motors


Given the available horsepower and a relatively lightweight an H12-44 was ideal for use in both yard switcher service as well as light freight duty.

Nearly 400 Constructed

The FM H12-44 became the builder's most successful diesel locomotive it ever produced with nearly 400 constructed over an eleven year period. Despite the fact that Fairbanks Morse diesels used the complicated opposed-piston prime mover, railroads became quite fond of them for their incredible lugging ability and relative lightweight.

FM 1850 RetirementRetirement

This particular locomotive pulled trains for the Heart of Dixie in years past. The EMD units 2019 and 2011 eventually replaced No. 1850. Currently this unit is listed as inoperable, or perhaps a better phrase is retired. However, given the proper mechanical work, it can be easily brought back into service on work trains and as a spare for our passenger service.