MPI MP20B

The MPI MP20B is a diesel-electric locomotive designed and built by MotivePower in Boise, Idaho.

MPI MP20B
Type and origin Power type Diesel-electric Builder MotivePower Model MP20B Build date 2007-2008 Total produced 21
Specifications Configuration: ​  • UIC B-B Gauge 4 ft 8+1⁄2 in (1,435 mm) Length 59 ft 2 in (18.03 m) Loco weight 277,000 lb (126,000 kg) Prime mover MTU-Detroit Diesel 12V4000 Caterpillar 3516C
Performance figures Maximum speed 70 mph (113 km/h) Power output 2,000 hp (1,490 kW) Tractive effort 85,000 lbf (380 kN) starting 55,000 lbf (240 kN) continuous

Specifications

The MP20 has a 2,000 hp (1,490 kW) MTU-Detroit Diesel 12V4000 engine. It weighs approximately 277,000 lb and is 59 ft 2 in long. It has a maximum speed of 70 mph (113 km/h). It also includes a B-B wheel arrangement and an optional dynamic brake. It includes a continuous tractive effort of 55,000 lbf (240,000 N) and a starting tractive effort of 85,000 lbf (380,000 N).^[1]

Union Pacific MP20Bs were powered by a Caterpillar 3516C.^[2]

Owners

Owner	Built	Number	Notes
Pacific Harbor Line[3]	2008	2
New Jersey Transit[4][5]	2008	5	Rebuilt from EMD GP40FH-2s
Union Pacific[6]	2008	13	Rebuilt from EMD GP50s[2]