This model was designed by Andreas Konkoly and was taken from the model plan volumes by Nick Rodgers and Pete Wood, published by the Runnymede Meccano Guild.
It is a relatively simple model to construct and builds well from the notes provided. I have used modellers licence to modify the model, with a different motor drive system implemented and the omission of some of the details like hand rails and a platform.
The model runs very well, though it does need certain beefing up in places, notably the main bearings.
It has parallel link motion to the piston, a nice flywheel and other detail.