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Record: 71951 (21/04/2026)
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LNER Gresley "B2" Class 4-6-0
Class Types
| LNER Class |
B2 |
General
| Designer |
Sir Nigel Gresley |
| Rebuilt By |
Thompson |
| Introduced |
1928 |
| Grouping Company |
London and North Eastern Railway |
| Wheel Arrangement |
4-6-0 |
| Number Built as B2 |
0 |
| Number Scrapped |
10 |
| Number Preserved |
0 |
| Manufacturers |
|
|
|
|
Power
| Variant Introduced |
1945 |
| Tractive Effort |
24,863lbs |
| Outside Cylinders |
20" x 26" (2 off) |
| Outside Valves |
10"Piston |
| Outside Motion |
Walschaerts |
Wheels
| Pony |
3' 2" |
| Drivers |
6' 8" |
| Locomotive Wheelbase |
28' 2" |
| Descriptive Wheelbase |
6' 3" + 5' 8" + 7' 3" + 9' 0" (engine only) |
Dimensions
| Length (over buffers) |
51' 5" |
| Weight (in running order) |
125t 10cwt |
| Adhesive Weight |
54t 14cwt |
| Maximum Axle Load |
18t 12cwt |
Boiler & Firebox
| Boiler Diagram |
100A |
| Boiler Max Diameter |
5' 6" |
| Boiler Barrel Length |
13' 117⁄8" |
| Boiler Pressure |
225lbs |
| Boiler Pitch |
9' |
| Firebox Length |
9' |
| Firebox Grate Area |
27.9ft2 |
| Firebox Heating Surface |
168ft2 |
| Tube Number |
141 |
| Tube Diameter |
2" |
| Tube Area |
1033ft2 |
| Flue Elements |
24 |
| Flue Diameter |
51⁄4" |
| Flue Area |
460ft2 |
| Total Evaporative Area |
1661ft2 |
| Superheater Elements |
24 |
| Superheater Element Diameter |
1.244" |
| Superheater Element Area |
344ft2 |
|