Class C (40) 4-6-4T
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| Origin | FMSR | Builder | Nasmyth Wilson, and North British Locomotive Company, Scotland |
| FMSR Class | C | Cylinder | 14.5 x 22 ins |
| FMSR Number range | 18-33 | Boiler Pressure | 250 psi |
| KTM Class | 40 | Driving Wheel Diameter | 54 ins |
| KTM Number range | 401.01-05, 402.01-06, 403.01-06 | Water Capacity | 2,000 gallons |
| Introduced | 1929 | Weight Full | 76 tons |
| Extinct | c1973 | Tractive Effort | 19272 lb |
Class C (later 40) consisted of two distinct designs of 4-6-4T. The original batch, delivered in 1929, had Caprotti valve gear. Two further batches, delivered 1939-40, had rotary cam poppet valve gear and smoke deflectors. In appearance they were like a tank version of the Class O pacifics. A fourth batch was cancelled, presumably due to wartime events.