ALCO RS-27

Minnesota Commercial Railway 318 at Minneapolis, July 2009

Type and origin
Power type	Diesel-electric
Builder	ALCO
Model	RS-27
Build date	December 1959 – October 1962
Total produced	27

Specifications
AAR wheel arr	B-B
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm)
Trucks	AAR type B
Wheel diameter	40 in (1,016 mm)
Minimum curve	21°
Wheelbase	40 ft 4 in (12.29 m)
Length	57 ft 2 ¹⁄₂ in (17.44 m)
Width	9 ft 11 ¹⁄₈ in (3.03 m)
Height	14 ft 6 in (4.42 m)
Loco weight	256,800 lb (116,500 kg)
Fuel capacity	2,000 US gal (7,600 L)
Prime mover	Alco 251B
RPM range	1000
Engine type	Four-stroke diesel
Aspiration	Turbocharged
Displacement	10,688 cu in (175.14 L)
Generator	GE 5GT-581-B1
Traction motors	(4) GE 5GE-752-E3
Cylinders	V16
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)

Performance figures
Power output	2,400 hp (1.8 MW)
Tractive effort	64,200 lb (29,100 kg)

Career
Locale	U.S.A.

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. Today, the Minnesota Commercial Railway has the only two operating RS-27s left.

Original Owners

Railroad	Quantity	Road Numbers	Notes
American Locomotive Company (demonstrator)	5	640-1 to 640-5	640-1 rebuilt as C424 for Pennsylvania Railroad, 640-2 through 640-5 to Union Pacific Railroad 675–678; 678 wrecked 1969, 675–676 sold 1971 to Montreal Locomotive Works and used as lease fleet on Roberval and Saguenay Railway and British Columbia Railway, sold to Devco Railway 1974, renumbered 214-215, scrapped 1984
Chicago and North Western Railway	4	900–903	One sold to Peabody Coal, three sold to Green Bay and Western 316–318; GBW 317 scrapped, 316 and 318 to Minnesota Commercial Railway
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

References

Dorin, Patrick C. (1972). Chicago and NorthWestern Power. Superior Publishing. p. 145. ISBN 0-87564-715-4.
Hayden, Bob (1980). Model Railroader Cyclopedia Volume 2, Diesel Locomotives. Milwaukee, Wisconsin: Kalmbach Publishing Company. ISBN 0-89024-547-9.
Pinkpank, Jerry A (1973). The Second Diesel Spotter’s Guide. Kalmbach Books. pp. 208, 252. LCCN 66-22894.

External links

Sarberenyi, Robert. Alco RS27 Original Owners.

Diesel-electric locomotives built by ALCO

Switchers	ALCO 300 ALCO 600 HH600 HH660 HH900 HH1000 S-1 S-2 S-3 S-4 DL420 S-5 S-6 T-6 SB-8/SSB-9

RS, RSC and RSD series	RS-1 RS-2 RS-3 RS-11 RS-27 RS-32 RS-36 RSC-1 RSC-2 RSC-3 RSD-1 MRS-1 RSD-4 RSD-5 RSD-7 RSD-12 RSD-15

Cab units	Rebel power car DL-103b DL-105 DL-107 DL-108 DL-109 DL-110 DL-202 DL-203 FA FB PA PB

Century series	C415 C420 C424 C425 C430 C628 C630 C636 C855

Diesel-hydraulics	DH643

Export locomotives	DL560C RSD-39

Unproduced locomotives	C428 C620 C624 C636F C636P C650DH

List of ALCO diesel Locomotives

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ALCO RS-27

Original Owners

See also

References

External links