The engine runs on air, better at higher speeds for which it was designed.
Complete with displacement lubricator.
| length/inches | 7 |
| width/inches | 6 |
| height/inches | 8 |
| weight/kg | 2 |
| bore x stroke/inches | 5/8 x 1 1/2 |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | pole |
| lubricator type | displacement |