Class 37 - English Electric Type 3 - Co-Co

• Built 1960-65 by the English Electric Company at Vulcan Foundry, Newton Le Willows.
• English Electric 12CSVT Engine of 1300 kW (1750 hp) at 850 rpm.
• English Electric 822/10G Main Generator, English Electric 538/A Traction Motors.
• Maximum Tractive Effort of 245 kN (55500 lbf), Continuous Tractive Effort of 156 kN (35000 lbf) at 13.6 mph.
• Power at Rail of 932 kW (1250 hp).
• Brake force 50 t, Air and Vacuum train brakes.
• 18.75 m over buffers, 1092 mm wheel diameter.
• Weight 103 - 108 t, Route Availability (RA) Index 5 or 7.
• Train heating Electric in Class 37/4 only, Electric Train Heating (ETH) Index 30.
• Design Speed 90 mph, Maximum Speed 80 mph.
• Multiple Working via the Blue Star Coupling Code.

Sub Class 37/0.

RA5, details as above. Members are: 37003 to 37298.

Sub Class 37/3.

Unrefurbished locos fitted with regeared (CP7) bogies. Details as above for class 37/0, except:

• Maximum Tractive Effort of 250 kN (56180 lbf), Continuous Tractive Effort of 184 kN (41250 lbf) at 11.4 mph.

Members are: 37330 to 37384.

Sub Class 37/4.

Refurbished locomotives fitted with train heating. Main generator has been replaced with an alternator. Regeared (CP7) bogies. All have twin fuel tanks. Details as for 37/0, except:

• Main Alternator Brush BA1005A.
• Maximum Tractive Effort of 256 kN (57440 lbf), Continous Tractive Effort of 184 kN (41250 lbf) at 11.4 mph.
• Power at Rail 935 kW (1254 hp).

Members of the 37/4 sub-class are: 37401 to 37431.

Sub Class 37/5.

Refurbished locomotives. Main generator replaced by an alternator. Regeared (CP7) bogies and all have twin fuel tanks. Details as for 37/4, except:

• Maximum Tractive Effort of 248 kN (55590 lbf).

Members are: 37503 to 37521 and 37667 to 37698.

Sub Class 37/6.

Refurbished locomotives modified for use with the Nightstar rolling stock. Main generator replaced by an alternator. Class 50 bogies. All have twin fuel tanks, train air brakes only, UIC brake and coaching stock jumpers, RCH jumpers and ETH through wires. Details as for 37/0 except:

• Main Alternator Brush BA1005A.

Members are: 37601 to 37612 (renumbered from 375xx).

Sub Class 37/7.

Refurbished locomotives. Main generator replaced by an alternator. Regeared (CP7) bogies. Twin fuel tanks and ballast weights added. Details as 37/4, except:

• Main Alternator GEC G564AZ (37796 - 37803), Brush BA1005A (Others).
• Maximum Tractive Effort of 276 kN (62000 lbf).
• Weight 120 t, Route Availability (RA) Index of 7.

Members are: 37701 to 37899.

Sub Class 37/9.

Refurbished locomotives. Fitted with manufacturers prototype power units and ballast weights. Main generator replaced by an alternator. Twin fuel tanks. Details as 37/0 except:

• Engine Mirrlees MB275T of 1340 kW (1800 hp) at 1000 rpm (37901-4), Ruston RK270T of 1340 kW (1800 hp) at 900 rpm (37905/6).
• Main Alternator Brush BA1005A (GEC G564AZ, 37905/6).
• Maximum Tractive Effort of 279 kN (62680 lbf), Continuous Tractive Effort of 184 kN (41250 lbf) at 11.4 mph.
• Weight 120 t, Route Availability (RA) Index of 7.

Members are: 37901 to 37906.

Class 37 Photographs.

37012 with an Engineer's train at Bristol Temple Meads on the 21st February 1993.	37059 "Port of Tilbury" and 37156 at Aberdeen Motorail Terminal on the 17th August 1992.
37063 pulls 47312 at Eastleigh on the 5th April 1992. The EPB unit is 6285. This line branches off the main Southampton line towards Fareham and Portsmouth.	37097 at Newport 10th October 1992.
37097 (back), 37158 and 37904 at Newport (Wales) stabling point on the 10th October 1992.	37222 passes through smoke at Nottingham with an engineer's train. Also present are DMUs 153315 / 153322 / 153328 and 51185 / 51511. Taken Valentine's Day 1993. This loco is now in the new Railfreight livery with Mainline markings.
37222 waits in the centre road at Nottingham station. Note the old railfreight coal livery. Taken 14/2/93.	37263 and 47522 at a wet Didcot Parkway on the 11th April 1993.
37402 "Oor Wullie" at Crainlarich on the 18th August 1992 with Petroleum tanks.	37414 at Crewe along with 158871 and 08907. 16th February 1993.
37414 stands at Southport on the 11th July 1993.	37422 and 37687 at Leicester station 6th September 1992.
37423 with the 12:02 Mallaig service at Fort William on the 18th August 1992.	37686 at Toton TMD on the 13th June 1993.
37672 forms the 14:10 from Paignton on the 21st June 1992. This train is leaving Goodrington Sands and was part of the Devon Diesel Society's Diesel Gala 1992.	37701 and 37798 at Barry Stabling Point on the 13th February 1993.
37796 runs light through Cardiff Central on the 13th February 1993.	37798 on coal duties at Barry. 13th February 1993.
37798 waits between duties at Barry Station (South Wales). 13th February 1993.	37799 hauls 60035 through Cardiff station on the 13th February 1993. This loco is now in the new railfreight livery with the Transrail markings and is named "Sir Dyfed / County of Dyfed."
37800 at the head of a metals train at Bristol Temple Meads.	37902 at Eastleigh Station on the 19th March 1992.

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(C) Copyright 1998, Written by Mark Chatwin.