ALCO RS-3

Specifications
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm);; 5 ft 3 in (1,600 mm) for Brazil
Trucks	AAR type B
Wheel diameter	40 in (1,016 mm)
Minimum curve	21°
Wheelbase	39 ft 4 in (11.99 m)
Length	56 ft 6 in (17.22 m)
Width	10 ft 1+5⁄8 in (3.09 m)
Height	14 ft 5+1⁄8 in (4.40 m)
Loco weight	247,100 lb (112,100 kg)
Prime mover	ALCO 244
Engine type	V12 Four stroke diesel
Aspiration	Turbocharger
Generator	GE GT-581
Traction motors	(4) GE 752
Cylinders	12
Cylinder size	9 in × 10+1⁄2 in (229 mm × 267 mm)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	American Locomotive Company; Montreal Locomotive Works
Model	RS-3
Build date	May 1950 – August 1956
Total produced	1,418

ALCO RS-3
ALCO RS-3
	A former Central Railroad of New Jersey ALCO RS-3 at Steamtown National Historic Site
Power type
Type and origin
Power type	Diesel-electric
Builder	American Locomotive Company; Montreal Locomotive Works
Model	RS-3
Build date	May 1950 – August 1956
Total produced	1,418
Configuration:;
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm);; 5 ft 3 in (1,600 mm) for Brazil
Trucks	AAR type B
Wheel diameter	40 in (1,016 mm)
Minimum curve	21°
Wheelbase	39 ft 4 in (11.99 m)
Length	56 ft 6 in (17.22 m)
Width	10 ft 1+5⁄8 in (3.09 m)
Height	14 ft 5+1⁄8 in (4.40 m)
Loco weight	247,100 lb (112,100 kg)
Prime mover	ALCO 244
Engine type	V12 Four stroke diesel
Aspiration	Turbocharger
Generator	GE GT-581
Traction motors	(4) GE 752
Cylinders	12
Cylinder size	9 in × 10+1⁄2 in (229 mm × 267 mm)
Maximum speed
Performance figures
Maximum speed	65–85 mph (105–137 km/h)
Power output	1,600 hp (1.2 MW)
Tractive effort	61,775 lb (28,021 kg)
Locale
Career
Locale	North America; Spain (purchased from US railroads); Brazil (MLW);

The ALCO RS-3 is a 1,600 hp (1.2 MW), B-B diesel-electric locomotive manufactured from May 1950 to August 1956 by American Locomotive Company (ALCO) and its subsidiary Montreal Locomotive Works (MLW). A total of 1,418 were produced: 1,272 for American railroads, 98 for Canadian railroads, 48 for Brazilian railroads, and 7 for Mexican railroads.

The RS-3 greatly resembled the earlier RS-2 and somewhat resembles the RS-1, but it had 100 more horsepower thanks to its 12-cylinder, 1,600 hp ALCO Model 244 engine. It also had some changes to the fuel system and body shape.

Much like the RS-1, many RS-3s served for decades; some are still in use as of 2022.