Baldwin DS-4-4-750

Baldwin DS-4-4-750
Type and origin Power type Diesel-electric Builder Baldwin Locomotive Works Model DS-4-4-750 Build date July 1949 to February 1951 Total produced 53
Specifications Configuration: ​  • AAR B-B  • UIC B′B′ Gauge 4 ft 8 1⁄2 in (1,435 mm) Prime mover 606NA RPM range 625 rpm max. Engine type Four-stroke diesel Aspiration Normally aspirated, solid 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 Straight-6 Cylinder size 12 3⁄4 in × 15 1⁄2 in (324 mm × 394 mm) Transmission Electric Loco brake Air Train brakes Air
Performance figures Power output 750 hp (559 kW)
Career Locale North America

Type and origin
Power type	Diesel-electric
Builder	Baldwin Locomotive Works
Model	DS-4-4-750
Build date	July 1949 to February 1951
Total produced	53

Specifications
Configuration:	​
• AAR	B-B
• UIC	B′B′
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Prime mover	606NA
RPM range	625 rpm max.
Engine type	Four-stroke diesel
Aspiration	Normally aspirated, solid 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	Straight-6
Cylinder size	12 3⁄4 in × 15 1⁄2 in (324 mm × 394 mm)
Transmission	Electric
Loco brake	Air
Train brakes	Air

Performance figures
Power output	750 hp (559 kW)

Career
Locale	North America

The Baldwin DS-4-4-750 was a four-axle 750 horsepower (560 kW) diesel-electric switcher built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1949 and 1951. It was a bridge between the 660 horsepower (490 kW) DS-4-4-660 and the S-8. It was the low power companion in Baldwin's catalog to their DS-4-4-1000 and the S-12.

Page 40 of the Dolzall brothers book "Diesels from Eddystone" describes the DR-4-4-750 as a "Horsepower boost for a lagging seller." Baldwin dropped the DR-4-4-660 model and introduced the new 750 HP DR-4-4-750. The Atchison, Topeka & Santa Fe (AT&SF) purchased nine in August 1948 and 21 units were sold in 1949 to six different customers.

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