Union Pacific 61 Union Pacific 60B, the only Century 855B built
Type and origin
Power type
Diesel-electric
Builder
American Locomotive Company (ALCO)
Serial number
84730–84731 (A units), 84732 (B unit)
Model
DL855, DL856
Total produced
3 (two A units, one B unit)
Specifications
Configuration:
• AAR
B+B-B+B
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Length
86 ft (26.21 m)
Loco weight
551,400 pounds (250,111 kg)
Fuel capacity
6,000 US gal (5,000 imp gal; 23,000 L)
Prime mover
Alco Dual 251C
Engine type
Dual V16 diesel
Generator
Direct Current GT598 generator
Traction motors
DC traction motors
Cylinders
32 (2 x 16)
Transmission
Electric
Performance figures
Power output
5,500 hp (4,101 kW)
Career
Operators
Union Pacific
Numbers
60–61, 60B
Locale
North America
Delivered
July 1964
Disposition
All 3 scrapped by 1972
Stats given in this table pertain to cab unit
The ALCO Century 855 was a model of 5,500 hp (4,101 kW) diesel-electric locomotive built in 1964 by the American Locomotive Company for the Union Pacific. The locomotive was notable for being ALCO's most powerful diesel-electric locomotive and, at the time, the most powerful diesel locomotive ever built,[1] being surpassed by the 6,600-horsepower (4,922-kilowatt) EMD DDA40X in April 1969.
The Century 855 was designed and built specifically for Union Pacific, which was in need of very high horsepower locomotives for its Overland Route through the Rocky Mountains.[2] Despite its impressive power output, all three examples of the class were scrapped by early 1972 due to mechanical unreliability.
^"6,000 HP Diesel-Electric for Fast Freight Traffic in USA" Railway Gazette July 3, 1964 pages 547-550
^Schafer, Mike (1998). Vintage diesel locomotives. Osceola, WI: Motorbooks International. p. 54. ISBN 0-7603-0507-2. OCLC 38738930.
The ALCOCentury855 was a model of 5,500 hp (4,101 kW) diesel-electric locomotive built in 1964 by the American Locomotive Company for the Union Pacific...
numbers 70 through 84. This request also led to the introduction of the ALCOCentury855 and GE U50. A further development of the 8 axle, twin-engined locomotive...
examples built survived into preservation. List of ALCO diesel locomotives ALCOCentury855 "ALCO 244 and 251 Diesel Engines". Pacific Southwest Railway...
Other locomotives built to this requirement were the EMD DD35A and the ALCOCentury855. The Southern Pacific kept the three but did not order any more. They...
1981. All were eventually scrapped. EMD DD35A EMD DDA40X EMD DDM45 ALCOCentury855 GE U50C Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide...
were sold for scrap during 1977–1978. Union Pacific GTELs EMD DD35A ALCOCentury855 GE U50 Morgan, David P. (May 1969). "Traction topics". Modern Railways...
the United States and List of preserved locomotives in Canada. ALCO announced its "Century Series" of diesel locomotives in 1963 as a leap forward in power...
The American Locomotive Company (often shortened to ALCO, ALCo or Alco) was an American manufacturer that operated from 1901 to 1969, initially specializing...
SEHK: 326 China Star Entertainment Ltd. SEHK: 327 Pax Global Limited SEHK: 328 Alco Holdings Limited SEHK: 329 Ruyan Group (Holdings) Limited SEHK: 330 Esprit...
Publishing Corp., § 18: Diesel-Electric Locomotives, at pages 894, 899. The Alco "Model RSD-##" designations had been discontinued by 1969. Durango buys White...
century, or still later, when the city came under threat from raids from both land and sea during the fifth century. However, from the ninth century to...
(『日車の車輌史』図面集-戦前産業車輌/旧外地鉄道編、日本車両鉄道同好部・鉄道史資料保存会編著、1997年、ISBN 4885400996。) "A Century of Chinese Steam Locomotives (1876–2001)", China Railway Publishing Company...
was unopposed for the September 26, 2006 Republican Primary, winning with 855 votes, and won the November 7, 2006 general election with 5,450 votes (55...
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