JNR Class DE11

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).

"DE11" redirects here. For the highway in Delaware, see Delaware Route 11.

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

Variants

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

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

DE11-0
JNR DE11 11 in August 1985

65 locomotives were built between 1968 and 1970.[2]

DE11-1000

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 East DE11 1045 in February 2005

DE11-1900

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

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 JR Freight livery in April 2011 showing the noise-reduction skirting

Fleet status

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
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
  1. 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. p. 102–103. ISBN 9784863207271.
  2. 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. p. 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)] (in Japanese). Japan: Railway Journal. p. 39. ASIN B01N59AJPB. ISSN 0288-2337.
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