13 long tons 1 cwt (29,200 lb or 13.3 t) (13.3 t; 14.6 short tons)
Loco weight
29 long tons 13 cwt (66,400 lb or 30.1 t) (30.1 t; 33.2 short tons)
Fuel type
Coal
Firebox:
• Grate area
16.6 sq ft (1.54 m2)
Boiler
GWR Sir Daniel
GWR Standard Goods
[1]
Boiler pressure
140 psi (970 kPa)
Heating surface
1,203 sq ft (111.8 m2)
Cylinders
Two, inside
Cylinder size
17 in × 24 in (432 mm × 610 mm)
Performance figures
Tractive effort
9,624 lbf (42.81 kN)
Career
Operators
Great Western Railway
Number in class
30
Numbers
378–387; 471–480; 577–586
Official name
378 Class
Nicknames
Sir Daniel
Withdrawn
1898–1904
Disposition
7 scrapped; 23 rebuilt as 0-6-0
The GWR 378 Class (also known as the Sir Daniel Class) was a class of 30 standard-gauge 2-2-2 steam locomotives on the Great Western Railway in Britain. They were introduced in 1866, and the class remained intact until 1898. Several were altered to the 0-6-0 wheel arrangement, and the last was withdrawn from service in 1920.
^Champ, Jim (2018). An Introduction to Great Western Locomotive Development. Barnsley: Pen & Sword Transport. pp. 319, 320. ISBN 978-1-4738-7784-9. OCLC 1029234106. OL 26953051M.
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