Complete with displacement lubricator and drain cocks. The workshop notes say "goes like a rocket on air - runs down to low speed just as well" - as might be expected from a short-stroke engine running on ball bearings.
| length/inches | 4 |
| width/inches | 4 |
| height/inches | 6 |
| weight/kg | 1 1/2 |
| bore x stroke/inches | 3/4 x 5/8 |
| wheel material | cast iron |
| cylinder material | cast iron |
| valve type | slide |
| lubricator type | displacement |