
Picture courtesy Graham Roberts ©2004
A lighter version of the Tribals for branch line operation, the 31 class had a smaller boiler and cylinders and a lighter tender. A total of 46 locos were built, deliveries commencing in 1955. They carried the numbers 3101 - 3146.
| Leading Dimensions | |
| Boiler Pressure | 200 lbs/sq.in |
| Grate Area | 30 sq.ft |
| Heating Surface | 1963 sq.ft |
| Cylinders | 17 in x 26 in |
| Driving Wheel diameter | 4 ft 0 in |
| Weight | 70.2 tons |
| Tractive Effort | 26600 lbs |
| Water Capacity | 4108 gals |
| Fuel Capacity | 1667 gals |
This set of images © Graeme Wall, 2005