A well-built engine, it runs nicely on air in either direction; fitted with Stephensons reversing gear, solid marine type flywheel and a geared boiler feed pump.
| length/inches | 9 1/2 |
| width/inches | 13 1/2 |
| height/inches | 21 |
| weight/kg | 22 |
| bore x stroke/inches | 2 1/4 x 2 |
| wheel material | cast iron flywheel, 7 1/4 inch diameter |
| axlebox type | plain bearing |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | pole |
| lubricator type | displacement |