Barrel is 3 1/2 inch diameter, firebox 4 inches long, 3 3/4 inches wide inside.
| gauge | 2 1/2 inch |
| length/inches | 17 1/2 |
| width/inches | 4 |
| height/inches | 6 |
| weight/kg | 4 1/2 |
| boiler number | RC56 |
| boiler maker | R Chambers |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |
| superheater(s) | 2 |