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ALCO S-1 to S-6

Works photo of Louisville and Nashville No. 2225, an S-4

To replace inefficient steam switchers, ALCO introduced the S series as a successor to the HH series in 1940. The new engine in these locomotives was now marketed under the ALCO brand, while the earlier switchers had ...

	ALCO S-1 to S-6 Remove
Variant	S-5 S-1, S-3 S-2, S-4 S-5 S-6
Built	1954
Manufacturers	ALCO;Montreal Locomotive Works
Wheel arrangement	BoBo
Gauge	1435 mm
Length	13843 mm
Service mass	104326 kg
Top speed	97 km/h
Power
Engine	ALCO 251A

General

Property	ALCO S-1 to S-6 S-5 S-1, S-3 S-2, S-4 S-5 S-6 Remove
Built	1954
Manufacturers	ALCO, Montreal Locomotive Works
Wheel arrangement	B-B
Gauge	1,435 mm

Dimensions and weights

Property	ALCO S-1 to S-6 S-5 S-1, S-3 S-2, S-4 S-5 S-6 Remove
Length	13.84 m
Wheelbase	9.14 m
Service mass	104.3 t
Adhesion mass	104.3 t
Rigid wheelbase	2.44 m
Axle load	26.1 t

Power plant

Property	ALCO S-1 to S-6 S-5 S-1, S-3 S-2, S-4 S-5 S-6 Remove
Engine	ALCO 251A
Engine type	6-cyl. diesel

Power

Property	ALCO S-1 to S-6 S-5 S-1, S-3 S-2, S-4 S-5 S-6 Remove
Power source	diesel-electric
Indicated power	597 kW (812 PS)
Top speed	97 km/h
Starting effort	255.8 kN

Calculated values

Property	ALCO S-1 to S-6 S-5 S-1, S-3 S-2, S-4 S-5 S-6 Remove
Factor of adhesion	1 : 4.00
Power-to-weight ratio	5.7 kW/t
Adhesive weight/Total	1 : 1.00

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