The engine runs well on air, with some wear evident in the crank bearings.
Curiously, it has a fabricated steel beam rather than the original cast iron one. Stuart list castings for the engine separately – if desired, it could be replaced at modest cost.
| length/inches | 16 |
| width/inches | 8 |
| height/inches | 12 |
| weight/kg | 7 |
| bore x stroke/inches | 1" x 2" |
| wheel material | flywheel cast iron, 7 inch diameter |
| cylinder material | cast iron |
| valve type | slide |
| lubricator type | displacement |