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Class 37 - Data Sheet

Welcome to our in-depth exploration of the British Railways & English Electric Class 37 locomotives. This section will provide you with comprehensive information about each sub-class, highlighting their unique characteristics, operational changes to each sub-class, and their history to the railway industry. Join us as we delve into the fascinating world of these iconic locomotives, showcasing their significance in British rail transport. Whether you’re a railway enthusiast or just curious, there’s plenty to discover!

Sub Class:
37/0
37/3
37/4
37/5
37/6
37/7
37/9
97/3
TOPS Numbers:

37001 - 37308

37330 - 37383
37401 - 37431

37501 - 37521

37667 - 37699

37601 - 37612

37701 - 37719

37796 - 37803

37883 - 37899

37901 - 37906

97301 - 97304

BR Number:

D6700 - D6999

D6600 - D6608

From main fleet

From main fleet

From main fleet

From main fleet

From main fleet

From main fleet

From main fleet

Built By:

English Electric, Vulcan Foundry &

Rober Stephenson & Hawthorn

-

-

-

-

-

-

-

Introduced:

1960 - 1965

1988 - 1995

1985 - 1986

1986 - 1988

1986 - 1988

1986 - 1987

1986 - 1987

2008

Wheel Arrangment:

Co-Co

Co-Co

Co-Co

Co-Co

Co-Co

Co-Co

Co-Co

Co-Co

Weight:

102 - 108 tonnes

102 - 108 tonnes

107 tonnes

107 tonnes

107 tonnes

120 tonnes

120 tonnes

105 tonnes

Height (see note 1):

12ft 9 1/16 in or

13ft 3/4 inch

12ft 9 1/16 in or

13ft 3/4 inch

13ft 3/4in

12ft 9 1/16 in or

13ft 3/4 inch

12ft 9 1/16 in or

13ft 3/4 inch

12ft 9 1/16 in or

13ft 3/4 inch

13ft 3/4 in

12ft 9 1/16 in or

13ft 3/4 inch

Length:

61ft  6in

61ft  6in

61ft  6in

61ft  6in

61ft  6in

61ft  6in

61ft  6in

61ft  6in

Width:

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

8ft  11 5/8inch

Wheelbase:

50ft  8in

50ft  8in

50ft  8in

50ft  8in

50ft  8in

50ft  8in

50ft  8in

50ft  8in

Bogie Wheelbase:

13ft  6in

13ft  6in

13ft  6in

13ft  6in

13ft  6in

13ft  6in

13ft  6in

13ft  6in

Bogie Pivot Centre:

37ft  2in

37ft  2in

37ft  2in

37ft  2in

37ft  2in

37ft  2in

37ft  2in

37ft  2in

Notes:

​

1. Locomotives fitted with body mounted horns are 12ft 9 1/16 inches in height, those with roof mounted horns are 13ft 3/4 inches in height.

​

2. Following the removal of steam heating systems, the steam boiler water tank was converted into an additional fuel tank, thus providing an additional 800 gallons capacity.

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The Class 37 Locomotive Group

Erinna Lodge, Mattishall Road

Dereham, Norfolk, NR20 3BU

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© 1997-2025 The Class 37 Locomotive Group (C37LG).

The C37LG is a registered charity, registered in England. | Charity number: 1137787 | VAT registration number: GB 720 172 183

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