ALCO RS-27

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ALCO RS-27

Power type	Diesel-electric
Builder	ALCO
Model	RS-27
Build date	December 1959 – October 1962
Total production	27
AAR wheel arr.	B-B
Gauge	4 ft 8½ in (1,435 mm)
Wheel diameter	40 in (1,016 mm)
Wheelbase	40 ft 4 in (12.29 m)
Length	57 ft 2½ in (17.44 m)
Width	9 ft 11⅛ in (3.03 m)
Height	14 ft 6 in (4.42 m)
Prime mover	Alco 251B
Displacement	10,688 cu in (175.14 l)
Cylinders	V16
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Power output	2,400 hp (1.8 MW)

The ALCO RS-27 (specification DL-640) is a diesel-electric locomotive built by ALCO between December 1959 and October 1962. Only 27 examples were manufactured. With ALCO's introduction of the Century Series line, the C-424 (specification DL-640A) replaced the RS-27 in the builder's catalog.

[edit] Original Owners

Railroad	Quantity	Road Numbers	Notes
American Locomotive Company (demonstrator)	5	640-1 to 640-5	Four sold to Union Pacific 675–678, one rebuilt as C424 for Pennsylvania Railroad
Chicago and North Western Railway	4	900–903	Three sold to Green Bay and Western 316–318, one to Peabody Coal
Green Bay and Western Railroad	1	310
Pennsylvania Railroad	15	2400–2414	to Penn Central and Conrail (same numbers)
Soo Line Railroad	2	415–416
TOTAL	27

[edit] References

• Sarberenyi, Robert. Alco RS27 Original Owners.
• Hayden, Bob (1980). Model Railroader Cyclopedia Volume 2, Diesel Locomotives. Milwaukee, Wisconsin: Kalmbach Publishing Company. ISBN 0-89024-547-9. 

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