EMD MRS-1

Specifications
Specifications
Configuration:;
• AAR	C-C
• UIC	Co'Co'
Gauge	4 ft 8+1⁄2 in (1,435 mm); 5 ft (1,524 mm); 1,668 mm (5 ft 5+21⁄32 in); 5 ft 6 in (1,676 mm);
Trucks	custom-design 3-axle multi-gauge trucks
Wheel diameter	40 in (1,016 mm)
Minimum curve	193 ft (59 m)
Wheelbase	44 ft 2 in (13.46 m)
• Bogie	13 ft 2 in (4.01 m)
Pivot centres	31 ft (9.4 m)
Length:;
• Over couplers	57 ft 5 in (17.50 m) (with AAR couplers); 57 ft 8+1⁄2 in (17.590 m) (with Willison couplers)
Width	9 ft 8 in (2.95 m)
Height	13 ft 6 in (4.11 m)
Axle load	40,000 lbf (180 kN)
Loco weight	240,000 lb (110,000 kg)
Fuel type	Diesel fuel
Fuel capacity	With steam generator: 800 US gal (670 imp gal; 3,000 L); No steam generator: 1,600 US gal (1,300 imp gal; 6,100 L)
Water cap.	For steam generator: 800 US gal (670 imp gal; 3,000 L) if fitted
Fuel consumption	Road average: 50 gal/h (190 L/h); Full load: 95 gal/h (79 imp gal/h; 360 L/h); Idle: 3.5 gal/h (2.9 imp gal/h; 13 L/h)
Prime mover	EMD 16-567B
Engine type	2-stroke diesel
Aspiration	Roots blower
Displacement	9,072 cu in (148.66 L)
Alternator	3-phase 149 V AC, 80 kW (110 hp)
Traction motors	600 V DC
Cylinders	V16
Cylinder size	8+1⁄2 in × 10 in (216 mm × 254 mm); bore x stroke
Gear ratio	60/17

Type and origin
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division
Order number	7013
Serial number	15873–15885
Model	MRS-1
Build date	March 1952 – June 1952
Total produced	13

EMD MRS-1
EMD MRS-1
	MRS-1 #1813 on the Heber Valley Railroad
Power type
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division
Order number	7013
Serial number	15873–15885
Model	MRS-1
Build date	March 1952 – June 1952
Total produced	13
Configuration:;
Specifications
Configuration:;
• AAR	C-C
• UIC	Co'Co'
Gauge	4 ft 8+1⁄2 in (1,435 mm); 5 ft (1,524 mm); 1,668 mm (5 ft 5+21⁄32 in); 5 ft 6 in (1,676 mm);
Trucks	custom-design 3-axle multi-gauge trucks
Wheel diameter	40 in (1,016 mm)
Minimum curve	193 ft (59 m)
Wheelbase	44 ft 2 in (13.46 m)
• Bogie	13 ft 2 in (4.01 m)
Pivot centres	31 ft (9.4 m)
Length:;
• Over couplers	57 ft 5 in (17.50 m) (with AAR couplers); 57 ft 8+1⁄2 in (17.590 m) (with Willison couplers)
Width	9 ft 8 in (2.95 m)
Height	13 ft 6 in (4.11 m)
Axle load	40,000 lbf (180 kN)
Loco weight	240,000 lb (110,000 kg)
Fuel type	Diesel fuel
Fuel capacity	With steam generator: 800 US gal (670 imp gal; 3,000 L); No steam generator: 1,600 US gal (1,300 imp gal; 6,100 L)
Water cap.	For steam generator: 800 US gal (670 imp gal; 3,000 L) if fitted
Fuel consumption	Road average: 50 gal/h (190 L/h); Full load: 95 gal/h (79 imp gal/h; 360 L/h); Idle: 3.5 gal/h (2.9 imp gal/h; 13 L/h)
Prime mover	EMD 16-567B
Engine type	2-stroke diesel
Aspiration	Roots blower
Displacement	9,072 cu in (148.66 L)
Alternator	3-phase 149 V AC, 80 kW (110 hp)
Traction motors	600 V DC
Cylinders	V16
Cylinder size	8+1⁄2 in × 10 in (216 mm × 254 mm); bore x stroke
Gear ratio	60/17
Maximum speed
Performance figures
Maximum speed	77 mph (124 km/h)
Power output	1,600 hp (1,190 kW)
	Source:

The EMD MRS-1 is a type of diesel-electric locomotive built by General Motors Electro-Motive Division for the United States Army Transportation Corps (USATC) in 1952. They were built with multigauge trucks and to a narrow loading gauge for service anywhere in the world in the event of war. Thirteen of the locomotives were built, with serial numbers 15873–15885. At almost $500,000 each in 1952 dollars, more than three times the price of a standard locomotive of the period, these were very expensive locomotives.

Declared un-needed for wartime operations in about 1970, they were then used on various military bases around the United States, with some serving on the Alaska Railroad. Five locomotives are preserved, three currently in operating condition.