Both engines require some finishing work, including making and fitting slide valves, rods and valve chest covers.
| length/inches | 12 |
| width/inches | 12 |
| height/inches | 16 |
| weight/kg | 30 |
| bore x stroke/inches | 2 x 2 |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | single eccentric |