loco-info.com - ALCO S-1 to S-6

Dimensions and Weights
Length	44 ft 5 in	45 ft 5 in
Wheelbase	30 ft
Rigid wheelbase	8 ft
Service weight	210,000 lbs	229,700 lbs	230,000 lbs
Adhesive weight	210,000 lbs	229,700 lbs	230,000 lbs
Axle load	52,500 lbs	57,425 lbs	57,500 lbs

Boiler

Boiler

Variant	S-1, S-3	S-2, S-4	S-5	S-6

Power Plant

Power Plant

Power
Power source	diesel-electric
Top speed	60 mph
Starting effort	57,500 lbf	69,000 lbf	57,500 lbf	61,500 lbf
Engine	ALCO 539 6L		ALCO 251A
Engine type	6-cyl. diesel
Fuel	635 us gal (diesel)
Engine output	600 hp (447 kW)	1,000 hp (746 kW)	800 hp (597 kW)	900 hp (671 kW)

Calculated Values
Factor of adhesion	1 : 3.65	1 : 3.33	1 : 4.00	1 : 3.74
Power-to-weight ratio	0.0029 hp/lb	0.0044 hp/lb	0.0035 hp/lb	0.0039 hp/lb
Adhesive weight/Total	1 : 1.00

diesel locomotive

freight

last changed: 09 2023

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