Baldwin S-12

Specifications
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	AAR type A
Wheel diameter	40 in (1,016 mm)
Minimum curve	44° (133.47 ft or 40.68 m radius)
Wheelbase	30 ft 8 in (9.35 m)
Length	48 ft (15 m)
Width	10 ft (3.0 m)
Height	14 ft (4.3 m)
Loco weight	240,000 lb (108,862 kg)
Prime mover	606A
RPM range	625 rpm max
Engine type	Four-stroke diesel
Aspiration	Turbocharger Elliott Company H503 (215 hp (160 kW))
Displacement	1,979 cu in (32.43 L) per cylinder; 11,874 cu in (194.58 L) total
Generator	Westinghouse YG40D
Traction motors	Westinghouse 362D (4)
Cylinders	Six
Cylinder size	12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	Baldwin Locomotive Works
Model	S12
Build date	January 1951–October 1956
Total produced	451

Baldwin S12
Baldwin S12
	A preserved S-12 at the Railroad Museum of Pennsylvania.
Power type
Type and origin
Power type	Diesel-electric
Builder	Baldwin Locomotive Works
Model	S12
Build date	January 1951–October 1956
Total produced	451
Configuration:;
Specifications
Configuration:;
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	AAR type A
Wheel diameter	40 in (1,016 mm)
Minimum curve	44° (133.47 ft or 40.68 m radius)
Wheelbase	30 ft 8 in (9.35 m)
Length	48 ft (15 m)
Width	10 ft (3.0 m)
Height	14 ft (4.3 m)
Loco weight	240,000 lb (108,862 kg)
Prime mover	606A
RPM range	625 rpm max
Engine type	Four-stroke diesel
Aspiration	Turbocharger Elliott Company H503 (215 hp (160 kW))
Displacement	1,979 cu in (32.43 L) per cylinder; 11,874 cu in (194.58 L) total
Generator	Westinghouse YG40D
Traction motors	Westinghouse 362D (4)
Cylinders	Six
Cylinder size	12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm)
Maximum speed
Performance figures
Maximum speed	60 mph (97 km/h)
Power output	1,200 hp (895 kW)
Tractive effort	Starting: 72,000 lbf (33,000 kgf) @30% ; Continuous: 34,000 lbf (15,000 kgf) @10.8 mph (17.4 km/h)
Disposition
Career
Disposition	Six preserved, remainder scrapped

Balwin DS-4-4-660 / DS-4-4-1000

Type and origin
Power type	Diesel-electric
Model	DS-4-4-660 / DS-4-4-1000
Build date	660: June 1946 to May 1949 1000: January 1951 – November 1951
Total produced	660: 139 1000: 446

Specifications
Configuration:
• AAR	B-B
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks	AAR Type A truck
Wheel diameter	36 in (914 mm)
Minimum curve	44° (133.47 ft (40.68 m) radius)
Wheelbase	30 ft 8 in (9.35 m)
Length	46 ft 6+1⁄4 in (14.18 m)
Width	9 ft 11+1⁄4 in (3.03 m)
Height	14 ft (4.27 m)
Loco weight	660: 196,600 lb (89,200 kg) 1000: 230,000 lb (100,000 kg)
Prime mover	660: Baldwin 606NA 1000: 608NA later 606SC
RPM range	625 rpm max.
Engine type	606: Straight-6 608: Straight-8 Four-stroke diesel
Aspiration	606NA and 608NA: Natural 606SC: Turbocharged
Displacement	1,979 cu in (32.43 L) per cylinder 606: 11,874 cu in (194.58 L) total 608: 15,832 cu in (259.44 L) total
Generator	West’hse 480 DC
Traction motors	(4) West’hse 362-D
Cylinders	Six
Cylinder size	12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm)
Loco brake	Air
Train brakes	Air

Performance figures
Power output	660: 660 hp (492 kW) 1000: 1,000 hp (746 kW)
Tractive effort	660: 56,500 lb (25,600 kg) 1000: 57,500 lb (26,100 kg)

Career
Locale	North America

The Baldwin S-12 or BLH S12 is a 1,200-horsepower (890 kW) diesel-electric switcher locomotive. Powered by a turbocharged 6-cylinder version of the 606A diesel prime mover, S12s were known for their "lugging" power, despite being temperamental. Like most BLH switchers, the S12 had AAR Type-A switcher trucks in a B-B wheel arrangement. 451 units were built between 1951 and 1956, when BLH left the locomotive market.