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Specifications
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length	60 ft 10 in (18.54 m)
Height	13 ft 11 in (4.24 m)
Prime mover	Winton 201-A
Engine type	V16
Cylinders	16
Train heating	Steam generator, 2 off

Type and origin
Type and origin
Power type	Diesel-electric
Builder	Electro-Motive Corporation (EMC)
Build date	August–October, 1937
Total produced	6

EMC TA
EMC TA
	Rock Island #601
Power type
Type and origin
Power type	Diesel-electric
Builder	Electro-Motive Corporation (EMC)
Build date	August–October, 1937
Total produced	6
Configuration:;
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length	60 ft 10 in (18.54 m)
Height	13 ft 11 in (4.24 m)
Prime mover	Winton 201-A
Engine type	V16
Cylinders	16
Train heating	Steam generator, 2 off
Maximum speed
Performance figures
Maximum speed	110 mph (180 km/h)
Power output	1,200 hp (890 kW)
Operators
Career
Operators	Rock Island
Numbers	601–606
Retired	1957–1958
Disposition	All scrapped

The EMC-TA was a model of diesel locomotive produced for the Chicago, Rock Island and Pacific Railroad by the Electro-Motive Corporation in 1937. The original six Rock Island Rockets streamliners were three- or four-car stainless-steel semi-articulated trainsets built by Budd Company, powered by six identical locomotives, #601-606. The locomotives were classified as model TA—the T indicating Twelve hundred hp (890 kW), the A indicating an A unit (cab-equipped lead locomotive). The Rock Island Line was EMC's only customer for the TA locomotive model.^[1]

The styling of the TAs resembled the A units of the contemporary EA and E1 built in 1937, but the single 1,200 hp Winton 201-A motor provided only two-thirds the power of the E-units' 1,800 hp twin motor arrangement, the TAs were shorter and lighter, and they rode two-axle rather than three-axle trucks. Future locomotives for high-speed and long-distance passenger service would follow the direction taken by the EA/EB, E1 and E2; EMC's FT locomotives introduced in 1939 would adapt the single-engine two-axle truck layout of the TA and the cab/booster format of the E units to freight service. With the introduction of the E-series and the TA units EMC undertook regular production of locomotives of their own design, opening the standardized mass production phase in marketing Diesel power for passenger service.

Like the E-series and F-series locomotives, the TA was constructed as a carbody truss rather than having a separate chassis, a weight-saving innovation of early streamliners adapted to full-sized locomotives. The single Winton 201-A V16 engine was placed centrally, centered on the side door and twin flanking windows. The generator was attached behind it, with a cooling fan and air compressor after that. The rear of the unit was taken up with two steam generators for train heating and reservoirs for the air brakes. The cab sat two crew, engineer on the right and fireman on the left. The sloped nose contained air brake and train control equipment; beneath them sat the batteries, and beneath the cab was the water reservoir for the train heating boilers. Fuel was carried beneath the locomotive between the bogie. The trucks were 2-axle, both axles powered, giving the locomotive a B-B wheel arrangement.

The original paint scheme was maroon, red and silver; the bright red was a band at window height and another lower down, linking up at the nose. The rest of the nose end of the locomotive was maroon, and this color continued back at the base of the locomotive beneath the bright red stripe. The rear body of the locomotive was silver to match the train's stainless steel finish. Liberal amounts of stainless steel trim were applied, including "THE ROCKET" behind the cab doors, while "ROCK ISLAND" was painted in maroon against the silver locomotive sides.

As delivered, the TAs had a single headlight, but within a few years the Rock Island added a second, gyrating headlight for additional warning at grade crossings. In the 1950s the railroad added new, larger numberboards and removed the side skirting and the rear diaphragms from most of the locomotives. Other additions included MU receptacles next to the upper headlight and replacing the retractable front couplers with fixed ones.

When the original Rocket trainsets were withdrawn from service, the TAs, unlike the power units of many early streamliners, were able to continue in service, as they were fully separate locomotives capable of hauling ordinary railroad cars. They served long second careers hauling local and suburban trains. The TAs were finally retired between 1957 and 1958; all were scrapped.

References

^ Lustig, David. "EMC's TA: A Locomotive That Kind of Didn't". Classic Trains. Vol. 25, no. Spring 2024. Kalmbach Media. p. 7.

Additional Reading

Hayden, Bob, ed. (1980). Model Railroader Cyclopedia - Volume 2: Diesel Locomotives. Kalmbach. ISBN 0-89024-547-9.
Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing Co. pp. 107–108, 111. ISBN 0-89024-026-4.
Marre, Louis A. (1982). Rock Island diesel locomotives 1930–1980. Cincinnati, Ohio: Railfax, Inc. pp. 71–72. ISBN 0-942192-00-1.