English Electric Growl 

Classes: Class 37/4

Class 37/4

© English Electric Growl / Vernon Large
The Pontypool & Blaenavon Railway is partially located within a World Heritage Site and one of Wales' leading tourist attractions close by, the Big Pit Mining Museum. Class 37/4, no. 37421 is seen crossing the bridge just at the entrance to Big Pit with the 1515 Blaenavon HL to Whistle Inn train

© Vernon Large
  • Overview
  • Status
  • Equipment
  • Specifications
  • History
  • Photographs
Refurbished
1985-1986
Refurbished by
BREL Crewe Works, Crewe, Cheshire for British Rail.
Running Numbers
37401-37431
Number Refurbished
31
Locomotive Status
Status
Total
In Traffic
13
Scrapped
18
Total
31
Engine
English Electric 12CSVT MKII
Main Alternator
Brush BA1005A
Auxiliary Alternator
Brush BA606A
Traction Motors
English Electric 538-5A x 6
Locomotive Brakes
Air
Train Brakes
Air, Vacuum
Train Supply/Heat
Brush BAH701
Wheel Arrangement
Co-Co
 
Imperial Metric
Gauge  
 4 ft 8½ in
 1435 mm
Minimum Curve  
 264 ft 0 in
 80467 mm
Length  
 61 ft 6 in
 18470 mm
Width  
 8 ft 11½ in
 2730 mm
Height  
 13 ft 0¾ in
 3960 mm
Weight  
 105½ tons
 107 tonnes
Fuel Capacity  
 1690 Gallons
 7682 Litres
Power Rating  
 1750 HP
 1304 kW
Tractive Effort (Start)  
 57,440 lbs
 256 kN
Tractive Effort (Cont)  
 41,250 lbs at 11¼ mph
 184 kN at 18.5 km/h
Speed  
 80 mph
 129 km/h

An overview of the history of the 'Class 37/4' locomotives will appear here

Click on Thumbnails below to see a larger image. [ 604 available ]

 

This page was last updated on Tuesday January 6th 2026