JNR Class DE11

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Class DE11
JR Freight DE11 2001 in January 2011
Type and origin
Power typeDiesel-hydraulic
BuilderKawasaki Heavy Industries, Nippon Sharyo
Build date1968–1979
Total produced116
Specifications
Configuration:
​
 • UICC-B
Gauge1,067 mm (3 ft 6 in)
Length
  • 14,150 mm (46 ft 5 in) (DE11-0/1000)
  • 16,650 mm (54 ft 8 in) (DE11-2000)
Width2,950 mm (9 ft 8 in)
Height3,965 mm (13 ft 0.1 in)
Axle load14 t
Loco weight70 t
Fuel typeDiesel
Fuel capacity2,500 l
Engine typeDML61ZB
TransmissionHydraulic
MU workingN/A
Performance figures
Maximum speed85 km/h (55 mph)
Power output
  • 1,250 hp (930 kW) (DE11-0)
  • 1,350 hp (1,010 kW) (DE11-1000/2000)
Tractive effort21,000 kgf (210,000 N; 46,000 lbf)
Career
Operators
Number in class10 (as of 1 April 2016)
DispositionIn service

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, 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]

JNR DE11 11 in August 1985

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]

  • JR Freight DE11 1029 in July 2013
    JR Freight DE11 1029 in July 2013
  • JR East DE11 1045 in February 2005
    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]

  • JR Freight DE11 2001 in April 2003, still in original JNR livery
    JR Freight DE11 2001 in April 2003, still in original JNR livery
  • JR Freight DE11 2001 in JR Freight livery in April 2011 showing the noise-reduction skirting
    JR Freight DE11 2001 in JR Freight livery in April 2011 showing the noise-reduction skirting

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, 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]

Main article: Japan Railways locomotive numbering and classification

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]

Wikimedia Commons has media related to JNR DE11.
  1. ^ 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.
  2. ^ 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.
  3. ^ JR全車輛ハンドブック1995 [JR Rolling Stock Handbook 1995] (in Japanese). Japan: Neko Publishing. 1995. p. 582.
  4. ^ 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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