In good condition, the engine turns over freely and runs on air.
| length/inches | 28 |
| width/inches | 15 |
| height/inches | 12 |
| weight/kg | 38 |
| bore x stroke/inches | 2 1/4 (est) x 4 |
| wheel material | cast iron flywheel |
| cylinder material | gunmetal |
| valve type | slide |