The work of an experienced engineer, it is a pretty fair representation of the prototype, whilst making concessions for ease of handling and robustness.
The return flue boiler is welded steel with expanded tubes, it comes with club history along with a recent hydraulic test.
The engine runs on air in both directions. Injector and mechanical pump are piped up to take water from a tank on a driving truck.
| gauge | 7 1/4 inch |
| length/inches | 35 |
| width/inches | 12 |
| height/inches | 27 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | screw |
| lubricator type | mechanical |
| injector(s) | 1 |
| boiler number | SF501-11881 |
| year built | 2012 |
| boiler maker | non-commercial |
| working pressure/psi | 90 |
| boiler type | return flue |
| boiler material | steel |
| boiler construction | welded, expanded tubes |
| hydraulic test valid to | 5/Sep/23 |
| superheater(s) | 1 |
| safety valve(s) | 2 |
| safety valve type | spring |
| mechanical pump | 1 |
| whistle | yes |