4 - 4 - 0 MENU


3200 'Dukedog or Earl' class introduction

Running numbers: 3200 - 3228.

Built:   1936-38     (3200 - 3219) to lot number 315,
          1938-39     (3220 - 3228) to lot number 331.

    The 'Dukedog' or 'Earls' class were in fact rebuilds using 'Bulldog' frames married with 'Duke' boilers. The prototype was 'Duke' number 3265 Tre Pol and Pen, withdrawn in December 1929, which was fitted with the frames of 'Bulldog' number 3365 Charles Grey Mott. Interestingly, when the class was in production, it was initially intended for 3265 to be renumbered 3200 as with previousDukedog class numbers 9017 (ex 3217) prototypes, however, it was decided that 3265 would fall into the number sequence at a later date. With the outbreak of World War Two, this chain of events never occurred and so 3265 would remain within the 'Duke' classification. The only difference between 3265 and the production 'Earl' locomotives was the use of 3 feet 2 inches bogie wheels instead of 3 feet 8 inches.

    The first production batch were fitted with boilers that were either non-superheater or employing the 'one-row' superheater. The second batch (3220 - 3228) were fitted with superheaters as standard.

Modifications.
    In 1946 the whole class was renumbered in the 9000 - 9028 series in the same order as before.

Withdrawals.
    With the onset of different operating conditions after World War II, withdrawals began in July 1948 through to 1960.

Preservation.
    Only one member of the class has been preserved, number 3217 ( ex 9017 ) Earl of Berkeley.

Specifications ( with later superheater).
Cylinders (2) 18 x 26 inches Driving wheel diameter 5 feet 8 inches
Bogie wheel diameter 3 feet 8 inches Tractive Effort 18,955 pounds
Boiler type Number 2 Boiler maximum dia. 4 feet 5 inches
Boiler minimum dia. 4 feet 4 inches Fire tubes, no. and dia. 195 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 180 lbs/square inch. Boiler length 11 feet 0 inches
Area of firegrate 17.2 square feet Heating surfaces, tubes 1,028.95 square feet
Heating surfaces, firebox 113.95 square feet Heating surfaces, superheater 75.3 square feet
Length 56 ft 1 in Total Weight 89 tons
Water Capacity 3500 gallons Coal Capacity 6 tons
G.W. Power Class B Route Availability Yellow
BR Power Classification 2-P

    

Atbara class introduction    Bird class introduction     Bulldog class introduction     City class introduction
County class introduction     Duke class introduction     Details: Earl or Dukedog class, 9000 to 9028     Flower class introduction

Preserved Steam Locomotives    Home Page    Locomotive name database

Sounds of Steam    Back to Basics    Barry Scrapyard     Sitemap    Steam Locomotive Index




Copyright © by John Daniel 2013.