FA/FB Diesel Locomotive

Prototype Information

ALCO produced the FA and FB series locomotives between 1946 and 1956 to compete with EMD’s successful F-unit. These cab units featured a distinctive, rugged nose designed by Ray Patten. The FA served as the lead unit with a cab, while the FB was a cabless booster unit. Together, they provided heavy-duty freight power for major railroads like the Pennsylvania, New York Central, and Erie.

The early FA-1 and FB-1 models used the 1,500-horsepower 244 engine. Later FA-2 and FB-2 versions increased this to 1,600 horsepower and featured a lengthened carbody. This extra space allowed for larger steam generators for passenger service. While these locomotives offered impressive pulling power and a stylish appearance, the 244 engine initially faced reliability issues. This allowed EMD to maintain market dominance, though many ALCO units remained in service for decades across North America.

Showing all 11 results