GWR 7200 Class

Class of 2-8-2 tank engines From Wikipedia, the free encyclopedia

GWR 7200 Class

The Great Western Railway (GWR) 7200 Class is a class of 2-8-2T steam locomotive. They were the only 2-8-2Ts built and used by a British railway,[1] and the largest tank engines to run on the Great Western Railway.[1]

Quick Facts Type and origin, Power type ...
GWR 7200 Class
Thumb
7248 in 1962
Type and origin
Power typeSteam
DesignerCharles Collett (Rebuilds)
Order number
  • Lot 266 (7200–7219)
  • Lot 233 (7220–7239)
  • Lot 318 (7240–7253)
RebuilderGWR Swindon Works
Rebuild dateJuly 1934–December 1939
Number rebuilt54
Specifications
Configuration:
  Whyte2-8-2T
  UIC1′D1′ h2t
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Leading dia.3 ft 2 in (0.965 m)
Driver dia.4 ft 7+12 in (1.410 m)
Trailing dia.3 ft 8 in (1.12 m)
Length44 ft 10 in (13.67 m)
Width8 ft 11 in (2.72 m)
Height12 ft 10+116 in (3.91 m)
Loco weight92 long tons 12 cwt (207,400 lb or 94.1 t) (103.7 short tons)
Fuel typeCoal
Fuel capacity
  • Standard bunker: 6 long tons (6.1 t; 6.7 short tons)
  • Coal Scuttle' bunker: 5 long tons (5.6 short tons; 5.1 t)
Water cap.
  • Standard bunker: 2,400 imp gal (11,000 L; 2,900 US gal)
  • Coal Scuttle' bunker: 2,700 imp gal (12,000 L; 3,200 US gal)
Firebox:
  Grate area20.56 sq ft (1.910 m2)
BoilerGWR Standard No. 4
Boiler pressure200 lbf/in2 (1.38 MPa)
Heating surface:
  Firebox128.72 sq ft (11.958 m2)
  Tubes and flues1,349.64 sq ft (125.386 m2)
Superheater:
  Heating area191.79 sq ft (17.818 m2)
CylindersTwo, outside
Cylinder size19 in × 30 in (483 mm × 762 mm)
Valve gearStephenson
Valve typePiston valves
Performance figures
Tractive effort33,170 lbf (147.5 kN)
Career
OperatorsGWR » BR
Class7200
Power classGWR: E
BR: 8F
Number in class30
Axle load classRed
Withdrawn1962–1965
DispositionThree under restoration, remainder scrapped
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Rebuild and operation

Summarize
Perspective

Originally, the 4200 class and 5205 class 2-8-0T were introduced for short-haul Welsh coal traffic, but the stock market crash of 1929 saw coal traffic dramatically fall. Built specifically for the short runs of heavy trains in the South Wales Coalfield, Charles Collett took the agreed decision to rebuild some of them with an extended coal carrying capacity and thus greater range and usefulness by adding 4 feet (1.22 m) to the frames, requiring the addition of a trailing wheel set, making them 2-8-2T.[2]

With the work carried out at Swindon Works, the first to be converted was 5275 (lot 266), which returned to traffic numbered 7200 in August 1934. A photograph of the prototype was taken on 27 July 1934 outside Swindon Works 'A Shop'. Nos. 5276–5294 were similarly rebuilt between August and November 1934, becoming 7201–7219, and Nos. 7220–7239 were rebuilt from 5255 to 5274 between August 1935 and February 1936; with both batches, the rebuilding was not in numerical order, but the new numbers were in the same sequence as the old. Nos. 7240–7253, rebuilt August 1937–December 1939, were selected at random from locomotives numbered in the 4200 series.[3] This last batch of conversions had been authorised on Lot 318.[4]

More information Class, Original ...
ClassOriginalRebuiltRebuild date
5205 52757200 August 1934
52767201 August–November 1934
52777202
52787203
52797204
52807205
52817206
52827207
52837208
52847209
52857210
52867211
52877212
52887213
52897214
52907215
52917216
52927217
52937218
52947219
52557220 August 1935–February 1936
52567221
52577222
52587223
52597224
52607225
52617226
52627227
52637228
52647229
52657230
52667231
52677232
52687233
52697234
52707235
52717236
52727237
52737238
52747239
4200[5] 42397240 August 1937–December 1939
42207241
42027242
42047243
42167244
42057245
42347246
42447247
42497248
42097249
42197250
42407251
42107252
42457253
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In 1937 the "scuttle" bunkers were fitted to the final fourteen of 42xx rebuilds (7240–53). This bunker modification consisted of a higher rivet line increasing the class's water capacity by an extra 200/300 gallons however reducing the coal capacity by 1 ton. These new bunkers were later fitted to a random handful of the class outside this batch including No. 7200, No. 7201, No. 7210 and No. 7239 during their heavy overhauls. No. 7200 is the only surviving loco of its class to have this unique feature.

The 54 rebuilt locos found work in most parts of the GWR system, where their 92 long tons 12 cwt (207,400 lb or 94.1 t) weight was allowed, although the rebuilt chassis length did get them banned from certain goods yards. Many found work in the home counties, deployed on iron ore and stone trains from Banbury.[6]

On 17 May 1941 No. 7238 ran into a bomb crater at Budbrook, near Hatton on the Banbury to Wolverhampton line.[7]

Withdrawal

The first member of the class to be withdrawn was number 7241 in November 1962, whilst the last four engines in traffic served until June 1965. Four of the class were bought by Woodham Brothers scrapyard in Barry, Vale of Glamorgan, and No. 7226 was scrapped there in 1965.[1]

Thumb
No. 7221, a converted 5205

Preservation

Three locomotives survive, all recovered from Woodham Brothers, though none have yet been returned to operational condition. However, in November 2020, the Buckinghamshire Railway Centre announced that a major milestone was reached with No. 7200.[8]

Both No. 7200 and No. 7202 have reached the final stages of overhaul.[citation needed]

More information Current Number, Year Built ...
Current Number Year Built Withdrawn Location Status Photograph Notes
No. 7200 1930 as No. 5275

(Rebuilt No. 7200 in 1934)

Jul 1963 Buckinghamshire Railway Centre Under Restoration Thumb Left Woodham Brothers, Barry Island in September 1981. Restoration is ongoing but has made significant progress in recent years.[timeframe?]
No. 7202 1930 as No. 5277

(Rebuilt No. 7202 in 1934)

Jun 1964 Didcot Railway Centre Under Restoration Thumb Left Barry Island in April 1974.
No. 7229 1926 as No. 5264

(Rebuilt No. 7229 in 1935)

Aug 1964 East Lancashire Railway Awaiting Restoration Thumb Left Barry Island in October 1984.
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Models

In 2012, Hornby released models of the 7200 class in both the original GWR green and BR black.[9]

Thumb
7203, a converted 5275

See also

References

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