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LNER Thompson Class B1
61059 at Norwich Thorpe, January 1958.
Type and origin
Power type
Steam
Designer
Edward Thompson
Builder
Darlington Works (60) Gorton Works (10) North British Locomotive Co. (290) Vulcan Foundry (50)
Build date
1942–1952
Total produced
410
Specifications
Configuration:
• Whyte
4-6-0
• UIC
2′C h2
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.
3 ft 2 in (0.965 m)
Driver dia.
6 ft 2 in (1.880 m)
Axle load
17 long tons 15 cwt (39,800 lb or 18 t)
Loco weight
71 long tons 3 cwt (159,400 lb or 72.3 t)
Fuel type
Coal
Boiler
LNER diagram 100A
Boiler pressure
225 psi (1.55 MPa)
Cylinders
Two, outside
Cylinder size
20 in × 26 in (508 mm × 660 mm)
Valve gear
Walschaerts
Valve type
10-inch (254 mm) piston valves
Performance figures
Tractive effort
26,878 lbf (119.56 kN)
Career
Operators
LNER » BR
Class
LNER: B1
Power class
BR: 5MT
Numbers
LNER:1000-1409,BR : 61000-61409
Nicknames
Bongos, Antelopes
Axle load class
Route Availability 5
Locale
Eastern Region
North Eastern Region
Scottish Region
Withdrawn
1961–1967
Preserved
(6)1264, 61306
Disposition
Two preserved, remainder scrapped
The London and North Eastern Railway (LNER) Thompson Class B1 is a class of steam locomotive designed by Edward Thompson for medium mixed traffic work.[1]
^Duggan, Jamie (7 April 2019). "LNER Thompson B1 Class steam locomotives - Class Information". RailAdvent. Retrieved 12 September 2022.
and 21 Related for: LNER Thompson Class B1 information
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