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The JNR Class DD41 was a diesel-electric locomotive operated by the Japanese National Railways from 1954 to March 1971.

History[]

The DD41 was a prototype diesel-electric locomotive used by the JNR, with a single locomotive prototyped while the company developed its own locomotives for domestic sales as well as potentially for export. A total of ten locomotives were prototyped; these were Hitachi's DF90, DF91 and DF93, Kawasaki's DF40, Kisha Seizō's DF41, Nippon Sharyo's DD42 and DD93, Shin-Mitsubishi's DD40 and DD91 and Toshiba's DD41. A single locomotive was built by Toshiba in 1954 and used as a switcher locomotive, initially numbered DD12 1 (not to be confused with the JNR Class DD12, another type of switcher locomotive); the locomotive was built in a technical partnership with General Electric.

Deployed at the Ōmiya Rolling Stock Center and reclassified as the Class DD41, the locomotive was used to perform switching duties and other light duties; in 1958 the locomotive was reclassified as the Class DD90 and renumbered DD90 1. As many of the locomotive's parts had to be imported to allow for maintenance DD90 1 was not used often and was withdrawn in March 1971 and scrapped.

Design[]

The DD41 featured a steeplecab-like design similar to most switcher locomotives. The locomotive is based on General Electric's 47-60-ton switcher locomotives.

Specifications[]

The DD41 was fitted with a single Cooper-Bessemer FW-6-LT prime mover, mated to a General Electric electric transmission; both the prime mover and transmission were manufactured under license by Toshiba who was in a technical partnership with both companies. The prime mover produced about 660 PS (485 kW).

JR Group motive power
JNR Diesel prototype DB10DC10DC11DD10
4-axle diesel DD11DD12DD13DD14DD15DD16DD17DD20DD21DD40DD41DD42DD50DD51DD53DD54DD90DD91DD92DD93
5-axle diesel DE10DE11DE15DE50
6-axle diesel DF40DF41DF50DF90DF91 (gen 1)DF91 (gen 2)DF92DF93
Shinkansen 911912
Narrow-gauge diesel Ke DB10Ke DB11
Early 2/4-axle freight electric AB10EB10ED10ED11ED12ED13ED14ED15ED16ED17ED18 (gen 1)ED18 (gen 2)ED19ED23ED24
Early 4-axle passenger electric ED50ED51ED52ED53ED54ED55ED56ED57
Early 6-axle freight electric EF10EF11EF12EF13EF14EF15EF16EF18
Early 6-axle passenger electric EF20EF50EF51EF52EF53EF54EF55EF56EF57EF58EF59HEF10HEF50
Early 8-axle electric EH10EH50HEH50HEH150
Early Abt rack rail electric EC40ED40ED41ED42
Acquired from private railways ED20ED21ED22ED25 (gen 1)ED25 (gen 2)ED26 (gen 1)ED26 (gen 2)ED27 (gen 1)ED27 (gen 2)ED28 (gen 1)ED28 (gen 2)ED29 (gen 1)ED29 (gen 2)ED30 (gen 1)ED31ED32ED33ED34ED35ED36ED37ED38Ke ED10DeKi 1RoKo 1DeKi 501RoKo 1000
DC 4-axle ED60ED61ED62ED63ED95
AC 4-axle ED44ED45ED70ED71ED72ED73ED74ED75ED76ED77ED78ED79ED90ED91ED93ED94
DC 6-axle EF60EF61EF62EF63EF64EF65EF66EF67EF90
AC 6-axle EF70EF71
Dual-current ED30 (gen 2)ED46ED92EF30EF80EF81
Other AH100
JR Group Dual-current electric ED500EF500EF510EH500
DC electric EF200EF210EH200
DC EMU M250
AC electric EH800
Diesel DD18DD19DB500DD200DF200ENR-1000
Hybrid HD300
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