ALCO RS-11

Specifications
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	AAR type B
Wheel diameter	40 in (1,016 mm)
Minimum curve	21° (274.37 ft or 83.63 m)
Wheelbase	39 ft 4 in (11.99 m)
Length	56 ft 6 in (17.22 m)
Width	10 ft 1+5⁄8 in (3.089 m)
Height	14 ft 5+1⁄8 in (4.397 m)
Loco weight	257,300 lb (116,700 kg)
Fuel capacity	2,000 US gal (7,600 L; 1,700 imp gal)
Prime mover	Alco 251B
RPM range	1,000 rpm max.
Engine type	V12 Four stroke diesel
Aspiration	Turbocharger
Generator	GE GT 581
Traction motors	(4) GE 752
Cylinders	12
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	ALCO, MLW
Model	RS-11
Build date	February 1956 to June 1961 (Alco) /November 1957-1 unit, June 1963 to April 1964 (MLW)
Total produced	431

ALCO RS-11
ALCO RS-11
	TPW 400, an RS-11 on display at Illinois Railway Museum, July 16, 2005.
Power type
Type and origin
Power type	Diesel-electric
Builder	ALCO, MLW
Model	RS-11
Build date	February 1956 to June 1961 (Alco) /November 1957-1 unit, June 1963 to April 1964 (MLW)
Total produced	431
Configuration:;
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	AAR type B
Wheel diameter	40 in (1,016 mm)
Minimum curve	21° (274.37 ft or 83.63 m)
Wheelbase	39 ft 4 in (11.99 m)
Length	56 ft 6 in (17.22 m)
Width	10 ft 1+5⁄8 in (3.089 m)
Height	14 ft 5+1⁄8 in (4.397 m)
Loco weight	257,300 lb (116,700 kg)
Fuel capacity	2,000 US gal (7,600 L; 1,700 imp gal)
Prime mover	Alco 251B
RPM range	1,000 rpm max.
Engine type	V12 Four stroke diesel
Aspiration	Turbocharger
Generator	GE GT 581
Traction motors	(4) GE 752
Cylinders	12
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Maximum speed
Performance figures
Maximum speed	70–85 mph (113–137 km/h)
Power output	1,800 hp (1,300 kW)
Tractive effort	64,325 lb (29,177 kg)
Locale
Career
Locale	North America South America

The ALCO RS-11 is a class of diesel-electric locomotive rated at 1,800 hp (1.34 MW), that rode on two-axle trucks, having a B-B wheel arrangement. This model was built by both Alco (327 units) and Montreal Locomotive Works (99 units). Total production was 426 units.

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