The following details are for No. 3401, and also apply for No. 3402 after May 1945.
| ITEM |
Imperial |
Metric |
| Cylinders (x3): |
|
15x26in. |
| Motion: |
Outside: |
Walschaerts |
| |
Inside: |
Gresley |
| |
Valves: |
7in piston |
| Boiler: |
Max. Diameter |
5ft 4in |
| |
Pressure: |
250psi |
| |
Diagram No.: |
112 |
| Heating Surface |
Total: |
1799.9 sq.ft. |
| |
Firebox: |
151.6 sq.ft. |
| |
Superheater: |
355.8 sq ft |
| |
Tubes: |
884.3 sq.ft. (143x 1.75in dia.) |
| |
Flues: |
408.2 sq.ft. (22x 5.25in dia.) |
| Grate Area: |
|
28.5 sq.ft. |
| Wheels: |
Leading: |
3ft 2in |
| |
Coupled: |
5ft 8in |
| |
Trailing: |
3ft 2in |
| Tractive Effort: |
(@ 85%) |
27,420lb |
| Wheelbase: |
Total: |
50ft 2.25in |
| |
Engine: |
29ft 4in |
| |
Tender: |
13ft |
| Weight: (full) |
Total: |
113 tons 3cwt |
| |
Engine: |
70 tons 8cwt |
| |
Tender: |
42 tons 15cwt |
| Max. Axle Load: |
|
17 tons |