Baldwin VO-660

Baldwin VO-660

Type and origin Power type Diesel-electric Builder Baldwin Locomotive Works Model VO-660 Build date April 1939 – May 1946 Total produced 142

Specifications Configuration: ​  • AAR B-B Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Length 48 ft 0 in (14.63 m) Loco weight 197,520–203,980 lb (89,600–92,500 kg) Prime mover De La Verne VO RPM range 625 rpm max. Engine type Straight-6 Four-stroke diesel Aspiration Normally aspirated, solid fuel injection Displacement 1,979 cu in (32.43 l) per cylinder 11,874 cu in (194.58 L) total Generator DC generator Traction motors DC traction motors Cylinders 6 Cylinder size 12.75 in × 15.5 in (324 mm × 394 mm) Transmission Electric Loco brake Straight air Train brakes Air

Performance figures Power output 660 hp (490 kW) Tractive effort 49,380–50,995 lbf (219.65–226.84 kN)

Career Locale North America, Cuba

Type and origin
Power type	Diesel-electric
Builder	Baldwin Locomotive Works
Model	VO-660
Build date	April 1939 – May 1946
Total produced	142

Specifications
Configuration:	​
• AAR	B-B
Gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Length	48 ft 0 in (14.63 m)
Loco weight	197,520–203,980 lb (89,600–92,500 kg)
Prime mover	De La Verne VO
RPM range	625 rpm max.
Engine type	Straight-6 Four-stroke diesel
Aspiration	Normally aspirated, solid fuel injection
Displacement	1,979 cu in (32.43 l) per cylinder 11,874 cu in (194.58 L) total
Generator	DC generator
Traction motors	DC traction motors
Cylinders	6
Cylinder size	12.75 in × 15.5 in (324 mm × 394 mm)
Transmission	Electric
Loco brake	Straight air
Train brakes	Air

Performance figures
Power output	660 hp (490 kW)
Tractive effort	49,380–50,995 lbf (219.65–226.84 kN)

Career
Locale	North America, Cuba

The Baldwin VO-660 was a diesel-electric locomotive switcher built by Baldwin Locomotive Works between April, 1939 and May, 1946. The 197,520–203,980 lb (89,600–92,500 kg) units were powered by a six-cylinder diesel engine rated at 660 horsepower (492 kW), and rode on two-axle AAR Type-A switcher trucks in a B-B wheel arrangement. 142 examples of this model were built for American railroads, along with the United States Navy. Baldwin replaced the VO-660 with the model DS-4-4-660 in 1946.

In the early 1960s the Reading Company sent all 10 of their VO-660s to General Motors Electro-Motive Division to have them rebuilt to SW900 specifications. These locomotives received new frames, cabs, and carbodies, and reused only the trucks and batteries from the VO-660's. Only four intact examples of the VO-660 are known to survive today. One was built as Baldwin 335, the first production VO-660. It was sold by the Altoona Railroaders Memorial Museum to SMS Lines to be repaired and put back into operation. SMS also owns the former Warner 11, which is being restored before being put into service. The others are Pickens Railway #2, built in 1946, and Wyandotte Terminal 103, at the Illinois Railway Museum. Those two are inoperable at the present time.

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