JNR Class DD51
Class DD51
DD51 1027 in October 2007
|
| Type and origin |
| Power type |
Diesel-hydraulic |
| Builder |
Hitachi, Kawasaki, Mitsubishi |
| Build date |
1962 - 1978 |
| Total produced |
649 |
|
| Specifications |
| UIC class |
B-2-B |
| Gauge |
1,067 mm (3 ft 6 in) |
| Wheel diameter |
860 mm |
| Length |
18,000 mm |
| Width |
2,951 mm - 2,971 mm |
| Height |
3,956 mm |
| Loco weight |
84 tonnes |
| Transmission |
Hydraulic |
|
| Performance figures |
| Maximum speed |
95 km/h (60 mph) |
| Power output |
2,200 hp |
|
|
|
| Type and origin |
| Power type |
Diesel-hydraulic |
| Builder |
Hitachi, Kawasaki, Mitsubishi |
| Build date |
1962 - 1978 |
| Total produced |
649 |
| Specifications |
| UIC class |
B-2-B |
| Gauge |
1,067 mm (3 ft 6 in) |
| Wheel diameter |
860 mm |
| Length |
18,000 mm |
| Width |
2,951 mm - 2,971 mm |
| Height |
3,956 mm |
| Loco weight |
84 tonnes |
| Transmission |
Hydraulic |
| Performance figures |
| Maximum speed |
95 km/h (60 mph) |
| Power output |
2,200 hp |
The Class DD51 (DD51形?) is a B-2-B wheel arrangement diesel-hydraulic locomotive type operated in Japan since 1962. 649 locomotives were built between 1962 and 1978 by Kawasaki Sharyo, Hitachi, and Mitsubishi. The class was designed for mainline passenger and freight use with more power than the D51 and a higher maximum speed than the C62 steam locomotive classes. This was achieved by installing two 1,100 hp engines in an 18 metre long centre-cab design, unusual for mainline operation. The V12 DML61 engines were developed from the 6-cylinder inline DMF31 engines used in the Class DD13 locomotives. As of 1 April 2016[update], 29 locomotives remained in operation.
Locos numbered from DD51 501 to 799 and from 1001 to 1186 were equipped to operate in multiple, and locos numbered DD51 800 to 899 and 1801 to 1805 were built without steam generators for train heating.
All locomotives numbered from DD51 2 onwards were finished in the standard diesel livery of orange/red with grey upper surfaces separated by a white stripe. Re-engined locos operated by JR Freight in Hokkaido sport a livery based on the Class DF200 colour scheme, with no white stripe. These locomotives were used in pairs double-heading freight trains.
JR Hokkaido locos were all finished in the "Hokutosei" livery of blue with a gold stripe and shooting star logo. These were used in pairs for hauling sleeper trains (Hokutosei, Cassiopeia, and Twilight Express) between Hakodate and Sapporo.
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