Bombardier HR-412

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4 ft 8+1⁄2 in (1,435 mm)Wheel diameter40 inches (1.0 m)Minimum curve30°WheelbaseBetween truck centers:
47 ft 7 in (14.50 m)
Truck wheelbase:
9 ft 4 in (2.84 m)Length61 feet 0 inches (18.59 m)Width10 feet 5 inches (3.18 m)HeightCab roof: 14 ft 11 in (4.55 m)
Overall: 15 ft 7 in (4.75 m)Loco weight272,000 lb (123,000 kg)
or 136 short tons (121 long tons; 123 t)Fuel typeDieselFuel capacity2,000 US gal (7,600 L)Lubricant cap.160 US gal (610 L)Coolant cap.200 US gal (760 L)Sandbox cap.56 cu ft (1.6 m³)Prime moverAlco 251CRPM range450 - 1050Engine typeV12 4-stroke dieselAspirationMechanically-assisted turbochargerGeneratorGE GTA17Cylinders12Cylinder size9 in (23 cm) diameter × 10+1⁄2 in (27 cm) strokeLoco brakeStraight air, DynamicTrain brakes26-L air

Performance figures
Maximum speed	67 mph (108 km/h)
Power output	2,400 hp (1.8 MW)
Tractive effort	60,000 lbf (267 kN)

Career
Operators	Canadian National Railway
Class	MR-20d
Numbers	2580-2589 (later 3580-3589)
Locale	North America

The Bombardier HR-412, also known as the MLW HR-412, was a 4 axle, 2,400 horsepower (1.8 MW) freight locomotive manufactured in Montreal, Quebec, Canada. Ten were built for Canadian National Railway in between September and November 1981, numbered 2580–2589, and one was built for Bombardier as a demonstrator in May 1982, numbered BBD 7000. BBD 7000 was later sold to Canadian National.^[1]

The model designation stood for HR - High Reliability, 412 - 4 axles, 12 cylinder engine. The HR-412 was designed as the successor to the MLW M-420.