JNR Class DE11
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The Class DE11 (DE11形) is a five-axle C-B wheel arrangement diesel-hydraulic shunting locomotive type operated in Japan since 1968. A total of 116 locomotives were built between 1968 and 1979, and as of 1 April 2016[update] , 10 locomotives remain in service, operated by East Japan Railway Company (JR East) and Japan Freight Railway Company (JR Freight).
Variants
[edit ]A total of 116 locomotives were built between 1968 and 1979, divided into the following sub-classes.[1]
- Class DE11-0: 65 locomotives built between 1968 and 1970
- Class DE11-1000: 46 locomotives built between 1970 and 1974 with uprated engines
- Class DE11-1900: One locomotive built in 1975 with experimental noise-reduction features
- Class DE11-2000: 4 locomotives built in 1979 with noise-reduction features
Design
[edit ]The Class DE11 was developed from the Class DE10 locomotive design, with the train-heating steam generator and multiple-working equipment removed and replaced with concrete ballast weight to increase the axle load from 13 t to 14 t to improve adhesion for use in shunting work.[1]
History
[edit ]DE11-0
[edit ]
65 locomotives were built between 1968 and 1970.[2]
DE11-1000
[edit ]46 locomotives were built between 1970 and 1974 with their engines uprated from 1,250 hp (930 kW) to 1,350 hp (1,010 kW).[2]
Locomotives DE11 1030, 1032, 1035, and 1046 were fitted with "SLC" (Shunting Locomotive Control) equipment to allow remote control at Musashino Marshalling Yard in Saitama Prefecture.[2]
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JR Freight DE11 1029 in July 2013
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JR East DE11 1045 in February 2005
DE11-1900
[edit ]One locomotive, numbered DE11 1901, was built in 1975, experimentally incorporating a number of features to reduce external noise for use in yards close to residential areas.[1] Features included additional sound-insulating around the engine compartment and a noise reduction unit on the exhaust chimney.[1]
DE11 1901 was withdrawn in 2000.[1]
DE11-2000
[edit ]Four Class DE11-2000 locomotives, numbered DE11 2001 to 2004 were built in 1979, incorporating some of the noise-reduction features tried out on DE11 1901. These locomotives also feature skirting to reduce noise.[2] The locomotive length was increased from 14,150 mm (46 ft 5 in) to 16,650 mm (54 ft 8 in).[2]
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JR Freight DE11 2001 in April 2003, still in original JNR livery
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JR Freight DE11 2001 in JR Freight livery in April 2011 showing the noise-reduction skirting
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Fleet status
[edit ]By 1 April 1995, 14 locomotives were still in service, with ten (nine DE11-1000 and DE11 1901) operated by East Japan Railway Company (JR East) and four (DE11-2000) operated by Japan Freight Railway Company (JR Freight)[3]
As of 1 April 2016[update] , 10 locomotives remain in service, with three (DE11-1000) operated by JR East and seven (three DE11-1000 and four DE11-2000) operated by JR Freight.[4]
Classification
[edit ]The DE11 classification for this locomotive type is explained below.
- D: Diesel locomotive
- E: Five driving axles
- 11: Locomotive with maximum speed of 85 km/h or less
References
[edit ]
- ^ a b c d e Jr機関車カタログ: Jr7社の現有30形式を詳しく解說 JR機関車カタログ [JR Locomotive Catalogue] (in Japanese). Japan: Ikaros Publications Ltd. 20 June 2013. pp. 102–103. ISBN 9784863207271.
- ^ a b c d e Ishii, Yoshitaka (2004). Dd51物語: 国鉄ディーゼル機関車2400両の開発と活躍の足跡 DD51物語 [The DD51 Story] (in Japanese). Tokyo, Japan: JTB Can Books. pp. 132–137. ISBN 978-4-533-05661-1.
- ^ JR全車輛ハンドブック1995 [JR Rolling Stock Handbook 1995] (in Japanese). Japan: Neko Publishing. 1995. p. 582.
- ^ Miyahara, Masakazu, ed. (December 2016). 国鉄最終章LAST (鉄道ジャーナル2017年2月号別冊) [JNR - The Final Chapter (Railway Journal February 2017 Extra issue)]. Tetsudō Jānaru (in Japanese). Japan: Railway Journal: 39. ASIN B01N59AJPB. ISSN 0288-2337.
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