Drawings of GWR Locomotives
0-6-0 Pannier Tanks
See this article for more details of the pannier tank classes
The family resemblance over the years is clear, as is the sometimes
striking differences in appearance caused by different types of
boiler in the 1076 Class. The variations in the 19th Century classes
create a positive minefield for modellers: a locomotive could go into
the works for a heavy overhaul and come out looking as if it were of
a different class. Its also interesting to note the differences
between Wolverhampton and Swindon built locomotives.
I believe the traditional practice of assigning the designer of each class to be the current CME is particularly nominal in the case of these tank engines. There was clearly a steady process of development from the original Armstrong designs, and the work would be done by various junior draughtsman under the direction of the drawing office management.
Some CMEs, Churchward particularly, had a regular and deep participation in the design work, but one suspects that Collett, for instance, whose greatest skills were in production engineering, might have adopted a more hands off approach. Reading K J Cook's Swindon steam, one can imagine an instruction like "We're in for a big batch of new tank engines. Combine the best from the 1854 and 2721 classes and get in all the new features so they run the maximum mileage between overhauls."
The drawings are in roughly chronological order.
If you can look at these drawings and gain a greater understanding of how these pannier tank designs evolved over the years then I will have achieved my aims with these sketches, but if you use them for anything beyond the simplest "plastic bashing" representational modelling then I have done you a disfavour by creating them.
The drawings are arranged so they can be opened in individual tabs of a tabbed browser and flicked between to look at the changes. Whilst they are to a consistent scale, I deliberately haven't shown the scale because of the various caveats noted above.
|1813||Lot 59. 1882.||Armstrong||0-6-0T|
|1076||(Buffalo) A late 19thC configuration,
not based on a specific diagram.
|633||Diagram J. Approx 1905.
|2721||Diagram A11. Approx 1909.||Dean||0-6-0T|
|1701||(1854 etc) Diagram A19. Approx 1909.||Dean||0-6-0T|
|1076||(Buffalo) Diagram A22. Approx 1911||Armstrong||0-6-0T|
|1501||(655) Diagram A35
|1076||(Buffalo) Diagram A61. Approx 1921.||Armstrong||0-6-0T|
|1076||(Buffalo) Diagram B23. Approx 1924.||Armstrong||0-6-0T|
|2721||Diagram B47. Approx 1924||Dean||0-6-0T|
|850||Diagram B51. Approx 1924.
|2021||Diagram B52. Approx 1924
|6400||Diagram B61. 1931.||Dean - Wolverhampton built.||0-6-0T|
|6400||Diagram B62. 1932.||Collett.||0-6-0T|
|1501||(645, 655) Diagram B65. Approx 1933.||Dean - Wolverhampton built.||0-6-0T|
|1366||Diagram B68. 1934.||Collett||0-6-0T|
|8750||(57xx late Cab) Diagram B70. 1933||Collett||0-6-0T|
|6400||Diagram B72. 1936.||Collett.||0-6-0T|
|5700||Diagram B74. Approx 1934.||Collett||0-6-0T|
|9400||(94xx) Diagram B78. 1947.
This is the GWR built batch with superheating.
|1500||(15xx) Diagram B80. 1949||Hawkesworth||0-6-0T|
|1600||(16xx) Diagram B81. 1949||Hawkesworth||0-6-0T|