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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
Wheel Diameter:

3ft  7in

3ft  7in

3ft  7in

3ft  7in

3ft  7in

3ft  7in

3ft  7in

3ft  7in

Brake Type:

Built Vacuum only, later

Dual braked

Dual

Dual

Dual

Dual

Dual

Dual

Dual

Sanding Equipment:

Pneumatic

Pneumatic

Pneumatic

Pneumatic

Pneumatic

Pneumatic

Pneumatic

Pneumatic

Train Heating Type:

Steam (removed)

N/A

Electric - Index 30

N/A

N/A

N/A

N/A

N/A

Train Heat Alternator:

N/A

N/A

Brush BAH-701

N/A

N/A

N/A

N/A

N/A

Route Availability:

5

5

5

5

5

7

7

5

Multiple Working Code:

Blue Star

Blue Star

Blue Star

Blue Star

Blue Star & DRS

Blue Star

Blue Star

Blue Star

Brake Force:

50 tonnes

50 tonnes

50 tonnes

50 tonnes

50 tonnes

50 tonnes

50 tonnes

50 tonnes

Engine Type:

English Electric 12CSVT

English Electric 12CSVT

English Electric 12CSVT

English Electric 12CSVT

English Electric 12CSVT

English Electric 12CSVT

Mirrlees MB 275T (37901 - 904)

Ruston RX 270T (37905 & 906)

English Electric 12CSVT

Engine Horsepower:

1,750hp

1,750hp

1,750hp

1,750hp

1,750hp

1,750hp

1,800hp

1,750hp

Power at Rail:

1,250hp

1,250hp

1,250hp

1,250hp

1,250hp

1,250hp

1,300hp

1,250hp

Tractive Effort:

55,500lb

55,500lb

55,500lb

55,500lb

55,500lb

55,500lb

62,000lb (37901 - 904)

62,680lb (97905 & 906)

55,500lb

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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