MPI MPXpress

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MPI MPXpress
Trainroadrunner.jpg
Rail Runner MP36PH-3C in New Mexico
Specifications
Power typeDiesel-electric
BuilderMotive Power, Inc. (Wabtec)
Build date2003-present
AAR wheel arr.B-B
Gauge4 ft 8 12 in (1,435 mm)
Wheel diameter3 ft 4 in (1,020 mm)
Minimum curve248 ft (76 m)
Wheelbase9 ft 0 in (2.74 m) (original)
9 ft 4 in (2.84 m) (new)
Length68 ft (21 m)
Width10 ft 7.5 in (3.239 m)
Height15 ft 6 in (4.72 m)
Locomotive weight285,000 to 295,000 lb (129,000 to 134,000 kg)
Prime moverEMD 16-645F3B (MP36PH-3S,3C)
EMD 16-710G3B-T2 (MP40PH-3C)
Top speed108 mph (174 km/h)
Power output3,600 hp (2,700 kW) (MP36PH-3S,3C)
4,000 hp (3,000 kW) (MP40PH-3C)
Tractive effort88,500 lbf (394 kN) (starting)
78,000 lbf (350 kN) (continuous)
72,500 lbf (322 kN) (starting, Metrolink)[1]
Career
Railroad(s)See list
 
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MPI MPXpress
Trainroadrunner.jpg
Rail Runner MP36PH-3C in New Mexico
Specifications
Power typeDiesel-electric
BuilderMotive Power, Inc. (Wabtec)
Build date2003-present
AAR wheel arr.B-B
Gauge4 ft 8 12 in (1,435 mm)
Wheel diameter3 ft 4 in (1,020 mm)
Minimum curve248 ft (76 m)
Wheelbase9 ft 0 in (2.74 m) (original)
9 ft 4 in (2.84 m) (new)
Length68 ft (21 m)
Width10 ft 7.5 in (3.239 m)
Height15 ft 6 in (4.72 m)
Locomotive weight285,000 to 295,000 lb (129,000 to 134,000 kg)
Prime moverEMD 16-645F3B (MP36PH-3S,3C)
EMD 16-710G3B-T2 (MP40PH-3C)
Top speed108 mph (174 km/h)
Power output3,600 hp (2,700 kW) (MP36PH-3S,3C)
4,000 hp (3,000 kW) (MP40PH-3C)
Tractive effort88,500 lbf (394 kN) (starting)
78,000 lbf (350 kN) (continuous)
72,500 lbf (322 kN) (starting, Metrolink)[1]
Career
Railroad(s)See list

MPXpress is a series of diesel-electric passenger train locomotives designed for commuter rail service. The manufacturer, Motive Power (Wabtec), offers the locomotives with a number of customizable options such as different prime movers and traction motors, head end power (HEP) generated by a separate engine or by the prime mover, and new or refurbished trucks. To date, MPI has offered four main variants: MP36PH-3S, MP36PH-3C, MP40PH-3C, and MP32PH-Q

The MPXpress line of locomotives were the first production passenger locomotives to meet EPA Tier 1 and Tier 2 emissions regulations, as well as FRA safety regulations regarding crashworthiness and fire safety. The line also meets APTA crashworthiness standards.

Numerous public transit agencies in Canada and the United States have ordered MPXpress locomotives for their commuter rail services.

Models[edit]

MP36PH-3S[edit]

A Metra MP36PH-3S. Thus far, Metra is the only railroad to order this model.

The MP36PH-3S uses a 16-cylinder EMD 645F3B diesel engine as its prime mover. Its HEP is generated from a static inverter that receives its power through connections to the prime mover — hence the "S" (static) designation. When providing full electrical power to the passenger cars connected to it, the prime mover must maintain a higher RPM in order to supply power to the passenger cars. The traction power when providing full HEP load of 500 kW is 2930 HP, since HEP generation diverts some power from the prime mover.[2]

Chicago's Metra ordered 27 of these locomotives, which were built and delivered in 2003–2004. Fourteen were to replace Metra's aged F40C fleet, while the rest were for expansion. When the locomotives were first delivered, they exhibited software and computer problems, to the point that Metra had to put two F40Cs back into service for a short time in 2004. One of the unique features of the MP36s in Metra's fleet compared to other operators is that they are equipped with a Gyralite (which is standard equipment on all of Metra's passenger locomotives), which are mounted in the spot on the front of the locomotive where the locomotive number board would otherwise be located. Metra is currently the only operator of the MP36PH-3S version.

In November 2012, Metra announced plans to convert 17 of their MP36PH-3S locomotives to the MP36PH-3C standard in an effort to reduce noise pollution and boost fuel efficiency.[3]

MP36PH-3C[edit]

The MP36PH-3C has the same prime mover as the "-3S" model, the EMD 645F3B diesel engine, but with its HEP generated by a separate Caterpillar C-27 [4] diesel engine, thus the "C" in its model name. In this arrangement, when providing HEP, the full 3600 HP from the prime mover is available for traction, and the prime mover is allowed to idle at a lower RPM. The Wabtec Q-Tron control system is used in all models built prior to 2008/9, while newer units use the same EM2000 system like GO Transit's MP40PH-3C.[4] Caltrain was the first to purchase the MP36PH-3C in 2003.

MP40PH-3C[edit]

A GO Transit MP40PH-3C.

The MP40PH-3C is similar to the MP36PH-3C, but with several differences:

GO Transit ordered 27 locomotives of this model to replace their aging EMD F59PH fleet, which were delivered throughout 2007 and 2008. An order for 20 additional units was signed in July 2008. In February 2010, yet another order was signed for 10 additional units. It was announced on November 1, 2011 that GO Transit would be swapping out the EMD prime movers of 11 MP40s for the new Cummins QSK95. It is currently unknown if the engine swap program will be expanded to include the rest of the GO fleet which is still relatively young.[5] More recently, it was decided that two QSK60s would be installed in lieu of the QSK95. This would provide a power increase to 5400 horsepower and improve emissions to EPA Tier IV standards.[6]

Both GO Transit and Sound Transit operate this model. They are to meet EPA Tier III emissions regulations.[7][8]

MP32PH-Q[edit]

An MPI MP32PH-Q locomotive in SunRail livery in September 2013.

The MP32PH-Q was built for SunRail to the similar specifications as new MPXpress but are refurbished units that had previously operated on MARC as GP40WH-2[9] locomotives. Inside the locomotive, the engines have been rebuilt and electronics have been upgraded using the same equipment as other MPXpress locomotives, but on the outside the MP32PH-Q retains the hood unit layout of the GP40WH-2 but with a new MPXpress cab.[7][10]

Operators[edit]

ModelSystemLocaleInventory
MP36PH-3SMetraChicago, Illinois10
MP36PH-3CCaltrainSan Francisco, California6
FrontRunnerSalt Lake City, Utah11
MARCWashington, D.C./Maryland26 + (10)
MBTABoston, MA2
MetraChicago, Illinois17 (Ex-3S)
MetrolinkLos Angeles, California15
Northstar LineMinneapolis, Minnesota6
New Mexico Rail Runner ExpressAlbuquerque, New Mexico9
Virginia Railway ExpressWashington, D.C./Virginia20
West Coast ExpressVancouver, British Columbia1
MP40PH-3CGO TransitToronto, Ontario57 + (10)
Sounder Commuter RailSeattle, Washington3
MP32PH-QSunRailGreater Orlando, Florida(8)

References[edit]

External links[edit]