ALCO S-5

ALCO S-5
A red locomotive in a freight yard
B&M S-5 #864 in Boston in September 1965
Type and origin
Power type Diesel-electric
Builder ALCO
Serial number 80915–80921
Model S-5 (Specification DL421 and DL421A)
Build date June 1954
Total produced 7
Specifications
Configuration:
 ​
 • AAR B-B
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Prime mover ALCO 251
Cylinders Straight 6
Performance figures
Power output 800 hp (600 kW)

The Alco S-5 (DL 421A) was a diesel-electric locomotive of the switcher type rated at 800 horsepower (600 kW), that rode on two-axle trucks, having a B-B wheel arrangement.

This was Alco's second attempt to build a replacement 251-engined switcher to replace the 539-engined S-3 and S-4. Only seven were sold. The demonstrator unit was ALCO specification DL421 and the six production units were ALCO specification DL421A. Alco fitted the 251A engine in its replacement, the S-6 with power output raised by 100 horsepower (75 kW).

Original Owners

RailroadQuantityRoad numbersNotes
Alco (demonstrator)
1
909to Island Creek Fuel and Transportation Company #102
Boston and Maine Railroad
6
860–865

See also

Media related to ALCO S-5 locomotives at Wikimedia Commons


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.