Bombardier–Alstom HHP-8

The Bombardier–Alstom HHP-8 (High Horse Power 8000) is a type of twin-cab electric locomotive manufactured by a consortium of Bombardier Transportation and Alstom for Amtrak and MARC. The locomotive's electrical drive technology is directly derived from the SNCF BB 36000 manufactured by Alstom.

Bombardier–Alstom HHP-8
MARC No. 4915 at Odenton in 2014
Type and origin
Power typeElectric
BuilderBombardier Transportation, Alstom
Total producedAmtrak: 15
MARC: 6
Specifications
Configuration:
  AARB-B
  UICBo’Bo’
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Wheel diameter40 in (1,016 mm)
Minimum curve249 ft (76 m)
Wheelbase9 ft 4 in (2.84 m)
  Truck35 ft 3 in (10.74 m)
Length67 ft 1 in (20.45 m) over couplers
Width10 ft 4 in (3.15 m)
Height14 ft 2 in (4.32 m)
Loco weight222,000 lb (101 t)
Power supplyOverhead line
Electric system/s
Current pickup(s)Dual pantographs
Traction motors4 × 1.5 MW (2,000 hp) Alstom 4-FXA-4559C
Loco brake
  • Electrical : regenerative and rheostatic brakes
  • Friction : two disc brakes per axle
Safety systemsCab signals, ACSES
Performance figures
Maximum speed135 mph (217 km/h)
Power output6,000 kW (8,000 hp) continuous
Tractive effort:
  Starting71,240 lbf (316.9 kN)
  Continuous56,200 lbf (250.0 kN)
Career
Operators
Numbers
  • Amtrak: 680-694 (formerly 650-664)
  • MARC: 4910-4915
Official nameHSEL (High Speed Electric Locomotive)
Retired2014 (Amtrak)
DispositionMARC units in service, Amtrak units stored.
Sources: except where noted

A small class size and reliability problems with correspondingly high per capita maintenance and replacement costs led Amtrak to retire all of its HHP-8s after only a decade in service. MARC initially made the decision to retire their HHP-8s, but later opted to refurbish their fleet from 2017 to 2018.

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