Introduced in 1960, the GE U25B
General Electric's first
independent entry into the United States domestic diesel electric
locomotive market for heavy production road locomotives since 1936.
From 1940 through 1953, GE participated in a design, production, and
marketing consortium (Alco-GE)
for diesel-electric locomotives with the
American Locomotive Company; the
U25B was developed following the termination of the consortium
The U25B (nicknamed
U-Boat) was the first commercially successful domestic diesel
electric road locomotive designed, built, and sold by General
Electric after its split with the
American Locomotive Company (Alco),
a company dating back to the steam era. Along with
Ingersoll-Rand, GE built the first
viable American diesel-electric locomotive in 1928. GE had
previously produced a number of prototype diesel
switchers, in part with Alco.
The U-Boat put GE on the
road to becoming the top locomotive producer in the US, much to the
EMD. It introduced many innovations
to the U.S. diesel locomotive market, including a pressurized car
body and a centralized air processing system that provided filtered
air to the engine and electrical cabinet, thus reducing maintenance.
The U25B was also the highest-horsepower four-axle diesel road
locomotive in the U.S. at the time of its introduction, its
contemporaries being the GP20 (2000 hp) and the RS27 (2400 hp).
Milwaukee 5057 was part of a
diesel engine instruction program at Webster Technical College in
Sidney Nebraska before donation to the Feather River Rail Society in
1991. The 5057 has recently been declared to not fit the
mission statement of the Feather River Rail Society, and is
currently available for preservation by another qualified rail
the FRRS Board of Directors for details. The 5057
is currently out of service, however, it can be made operational
with relatively minor repairs.