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2251 class introduction

Running numbers: 2251 - 2299, 2200 - 2250, 3200 - 3219.

Built:   1930      (2251 - 2270) to lot number 261,
          1934      (2271 - 2280) to lot number 283,
          1936      (2281 - 2290) to lot number 298,
          1938      (2291 - 2299, 2200) to lot number 312,
          1939      (2201 - 2210) to lot number 322.
          1940      (2211 - 2230) to lot number 337,
          1944-45 (2231 - 2250) to lot number 347,
          1946-48 (3200 - 3219) to lot number 360.

        The '2251' class were designed to replace the Armstrong and Dean goods engines in use on lines in Central Wales. Utilising '2251' class number 3205 while visiting the Severn Valley Railwaythe Standard number 10 boilers, 5 feet 2 inch driving wheels, copper capped chimneys and large wide cabs with side windows, the class found favour working short haul main line trains and branch passenger usage.

     20 engines that were a little different from the rest of the class were numbers 2211 - 2230 built in 1940 which did not have the side windows fitted due to safety fears in wartime. In addition, numbers 2281 to 2286 were built with tenders from the 'Aberdare' class, as were another ten engines that were coupled to these tenders from time to time.

Withdrawal.
        The first locomotive of the class withdrawn was number 2258 in December 1958 while the last engine in service was number 2210, withdrawn in June 1965.

Preservation.
        Only 1 example of the '2251' class has been preserved, namely number 3205.


Specifications.
Cylinders (2) 17½ x 24 inches Driving wheel diameter 5 feet 2 inches
Full weight of engine 43 tons 8 cwt Tractive Effort 20,155 pounds
Boiler type Number 10 Boiler maximum dia. 5 feet 0½ inches
Boiler minimum dia. 4 feet 5 1/8 inches Fire tubes, no. and dia. 218 x 1 5/8 inches
Flue tubes, no. and dia. 6 x 5 1/8 inches Superheater tubes, no. and dia. 36 x 1 inch
Boiler pressure 200 lbs/square inch. Boiler length 10 feet 3 inches
Area of firegrate 17.4 square feet Heating surfaces, tubes 1,069.42 square feet
Heating surfaces, firebox 102.4 square feet Heating surfaces, superheater 75.68 square feet
Length 53 ft 8¼ in Total Weight (GW tender) 80 tons 3 cwt
Total Weight (ROD tender) 91 tons 2 cwt Water Capacity 3000 gallons
Coal Capacity 5 tons G.W. Power Class B
Route Availability Yellow BR Power Classification 3-MT

    

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