MBTA locomotive No. 2001, a brand new MPI HSP46, arrives at Reading on its first revenue round trip on April 16, 2014.

By Pi.1415926535 - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=32215056

MBTA locomotive No. 2001, a brand new MPI HSP46, arrives at Reading on its first revenue round trip on April 16, 2014.

MBTA locomotive No. 2001 crosses the Charles River Bridge en route to the MBTA Commuter Rail Maintenance Facility, shortly after its first revenue run.

By Pi.1415926535 - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=32219001

MPI HSP46 Overview
Type and origin
Power type: Diesel-electric
Builder: MotivePower, Inc. (Wabtec)
Model: HSP46
Build date: 2013-2014
Total produced: 40
AAR wheel arrangement: B-B
UIC class: Bo′Bo′
Gauge: 4 ft 8 1⁄2 in (1,435 mm)
Trucks: MPI MP1114, 4-wheel, cast frame w/ traction pivot
Wheel diameter: 40 in
Minimum curve: 20 degrees (288 ft 0 in (87.78 m)
Wheelbase: 45 ft 0 in (13.72 m) (between truck centers)
Length: 71 ft 0 in (21.64 m)
Width: 10 ft 0 in (3.05 m)
Height: 15 ft 4.5 in (4.686 m)
Axle load: 72,500 lb (32,885 kg) Max
Adhesive weight: 100%
Locomotive weight: 287,500 lb (130,408 kilograms)
Fuel type: Diesel
Fuel capacity: 2,000 gal (7,600 l; 1,700 imp gal)
Coolant capacity: 360 gal (1,400 l; 300 imp gal)
Prime mover: GE GEVO-12
RPM range: 440-1050 (600-1050 while supplying HEP)
Engine type: 45° V12, four stroke cycle diesel engine
Aspiration: Turbocharged
Displacement: 188.5 L (49.8 US gal; 41.5 imp gal)
Alternator: GE 5GMG211 Traction Alternator with Integral HEP winding, Single bearing
Traction motors: 4 GE GEB-15 AC Traction Motors
Cylinders: 12
Cylinder size: 15.7083 liters (958.58 cu in)
Transmission: AC-DC-AC
MU working: Yes
Train heating: Locomotive-supplied head-end power; Inverter HEP
IGBT based w/ capacitor/inductor filtration
804 hp (600 kW), 3 phase ,480 VAC
Locomotive brake: Electropneumatic w/ blended dynamic braking
Train brakes: Electropneumatic
Safety systems: ATC / ACSES / PTC
Performance figures
Maximum speed: 110 mph (177 km/h) (design)
Maximum speed: 80 mph (129 km/h) (service)
Power output At alternator: 4,650 hp (3,470 kW)
Power output At wheel (HEP dependent): ~4,300 hp (3,200 kW) to ~3,500 hp (2,600 kW)
Tractive effort: 289.14 kN (65,000 lbf) starting
Factor of adhesion: 4.423
Operator: Massachusetts Bay Transportation Authority
Numbers: 2000-2039
Locale: Boston, MA
Delivered: October 24, 2013 -
First run: April 16, 2014

See also:

MPI (Wabtec)

MPI Locomotives

Diesel Locomotives

Wabtec logo
MBTA locomotive No. 2001 crosses the Charles River Bridge en route to the MBTA Commuter Rail Maintenance Facility, shortly after its first revenue run.
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MPI HSP46 Diesel-Electric Locomotive
The MPI HSP46 is a four-axle AC-traction diesel-electric locomotive for commuter trains, designed and assembled by MotivePower, Inc. It meets EPA Tier 3 emissions standards. The launch customer is the Massachusetts Bay Transportation Authority (MBTA), whose first unit entered revenue service in April 2014.

The MBTA Board of Directors voted on July 14, 2010 to approve the purchase of 20 new HSP46 locomotives from MotivePower, Inc, at a cost of $6 million per unit. The locomotives are powered by GE GEVO-12 diesel engines from GE Transportation Systems, equipped with a static inverter for head end power, and capable of meeting the stringent new Tier 3 emissions regulations. AC traction systems, prime movers, head end power equipment, and computer systems are supplied by GE, while MPI supplies the brake systems, air systems, and cooling systems.

On July 27, 2011, the MBTA released images of a new paint scheme for the authority's HSP46 fleet. It was chosen by the general public in an online survey.

On July 11, 2012, the MBTA Board voted to approve the first option for 7 locomotives, bringing the order total to 27 units (2000-2026). On April 10, 2013, the Board approved the purchase of the remaining 13 option locomotives, bringing the current order total to 40 units (2000-2039), at a total cost of $240 million.

On October 24, 2013, the first pilot unit, No. 2001, was delivered to the MBTA Commuter Rail Maintenance Facility to begin testing and training. Two other pilot units were also released from Motive Power Industries: No. 2000 to GE's Test Facility in Erie, Pennsylvania, and No. 2003 to the Transportation Technology Center, Inc. test facility in Pueblo, Colorado. Only No. 2001 was given the MBTA paint scheme; the other two test units were unpainted.

On April 16, 2014, No. 2001 entered revenue service, with its first round trip taking place on the Haverhill Line. As of October 2015, 36 of the 40 locomotives are in service. En route to the MBTA, the locomotives were sent to the Providence and Worcester Railroad, who is subcontracted to MPI to prepare the units for revenue service.

In August 2014, MPI discovered that some traction motor bearings had been shipped improperly to their factory, causing early failures. Locomotives already delivered to the MBTA were repaired on site, while half of the locomotives were redirected to Altoona Works during delivery for replacement bearings to be installed. The issues were not disclosed to the press until January 2015. While the repairs were performed under warranty at no cost to the MBTA, they constituted an additional delay that prevented some of the units from entering service prior to the end of 2015. The multiple delays and early mechanical issues have raised concern from industry commentators about the MBTA's procurement process and the overall quality of the locomotives.

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