model:

builder:

built:

builder number:

prime mover:

horsepower:

operating weight:

length:

max. speed:

GP30

GM Electro-Motive Division

September 1962

27558

567D3 - 16 cylinders

2250

260,000 lbs.

56 ft. 2 in.

70 MPH

In the late 1950's, builders of railroad locomotives began what is commonly referred to as "The Horsepower Race". Each of the major builders began introducing ever more powerful diesel engines on their newest models. In 1959, the General Electric Company took the lead by introducing a 2500 horsepower locomotive. In 1962, the industry leader, the Electro-Motive Division of General Motors, fought back with a uniquely styled model: the GP30.

The GP30 boasted a variety of improved features over its predecessors, including higher capacity traction motors (the motors which drive the wheels), a pressurized engine bay (designed to keep the internal workings cleaner) and an improved electrical system. The electrical system had a most visible effect on the styling. The cabinet was so tall that the locomotive designers created the unique "hump" over the cab to contain it.

The Union Pacific Railroad embraced the model and purchased the largest fleet of them, acquiring 152 before production ended in mid-1963. This included 40 cabless versions, unique to the UP. At first they were used on mainline trains, but were soon bumped to lower priority service as the horsepower race heated up and the railroad quickly purchased more powerful locomotives. They worked in local and switching service by the late 1980's and several roamed the former Western Pacific following its merger into the UP. The WP itself actually ordered this type locomotive, but production ended before they were delivered and the railroad received its successor model. .