MPI MP8AC-3
Metropolitan Transportation Authority class R156
United States 2012 28 produced
The MP8AC-3 is a diesel-electric locomotive built by MotivePower, Inc for the New York City subway. Right from the basic concept, it was developed as a work train locomotive for this operator. The model name here stands for 800 hp and AC drive.
Since the third rail is generally switched off during work, an electric drive was completely dispensed with. Instead, in addition to the 800 hp main diesel, a second, smaller one is used, which is used to generate electricity when stationary. The bogies are the same from Kawasaki as on the R160 class subway trains and use the same three-phase traction motors from Siemens.
Technical data
General
- Built
- 2012-2013
- Manufacturers
- MotivePower
- Wheel arrangement
- B-B
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 16.24 m
- Wheelbase
- 10.97 m
- Service mass
- 52.6 t
- Adhesion mass
- 52.6 t
- Axle load
- 13.2 t
Power plant
- Engine
- Cummins QSK 23G
- Engine type
- 6-cyl. diesel
Power
- Power source
- diesel-electric
- Indicated power
- 641 kW (872 PS)
- Top speed
- 48 km/h
- Starting effort
- 90.1 kN
Calculated values
- Factor of adhesion
- 1 : 5.73
- Power-to-weight ratio
- 12.2 kW/t
- Adhesive weight/Total
- 1 : 1.00
