Unsteamed from new, the engine has a silver-soldered boiler by Western Steam. It runs on air - better one way than the other, we suspect it could be improved with attention to the valve setting.
| gauge | 5 inch |
| length/inches | 36 |
| width/inches | 9 1/2 |
| height/inches | 14 1/2 |
| wheel material | cast iron |
| cylinder material | gunmetal |
| valve type | piston |
| valve gear | Walschaerts |
| reverser type | pole |
| lubricator type | mechanical |
| injector(s) | 1 |
| boiler number | WSME 226.02.03 |
| boiler maker | Western Steam |
| CE mark | yes |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |
| superheater(s) | 5 |
| superheater type | flue tube |
| safety valve(s) | 2 |
| safety valve type | spring |
| mechanical pump | 1 |
| hand pump | 1 |
| steam pump | 0 |
| whistle | yes |