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The JNR Class DC11 was a diesel-electric locomotive operated by the Japanese National Railways from September 1930 to 1935.

History[]

The DC11 was an early diesel locomotive operated by the Japanese National Railways. The locomotive was imported as an example of a switcher diesel locomotive alongside the DC10 for a trial period. One locomotive, DC11 1, was manufactured by Maschinenfabrik Esslingen in 1929; the locomotive arrived at Kobe Port in June 1929, where it was disassembled and inspected before being assembled again at Takatori Works. The locomotive's electrical systems were manufactured by Brown Boveri and its engine was manufactured by Maschinenfabrik Augsburg-Nürnberg AG (MAN).

After performance testing in August 1929, DC11 1 entered service on 25 September 1930 for use on a stretch of the San'yō Main Line; it would then be assigned to Takatori Rolling Stock Depot and performed switching duties around Kobe Port. Being designed during a period where technology used in the locomotive was still being researched and developed, many design defects and issues were present, such as the maintenance issues for the engine and constant engine failures; there was also an inability to procure or manufacture parts of sufficient quality due to Japan's technology at the time. As a result the locomotive was withdrawn from service in 1935, with many failures having occurred. DC11 1 remained at Takatori Works during that time but was lost near the end of the Pacific War.

Despite the locomotive's unsatisfactory performance, data from the DC11 was used to develop the DD10, another early diesel locomotive.

Design[]

The DC11 featured a steeplecab-like design.

Specifications[]

The DC11 was fitted with a MAN W6Vu28/38 prime mover and a Brown Boveri electric transmission system; this prime mover produced about 600 PS (441 kW). It had a drive system similar to a steam locomotive, featuring a set of jackshafts.

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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