Ruston Proctor 4" Scale SD Tractor (available in Imperial only)                            

Length - 47"

Height - 37"

Track Front - 12 3/4"

Track Rear - 19 1/2"

Wheel Base - 24 1/2"

Front Wheel - 12" OD

Rear Wheel - 16" OD

Flywheel - 10" OD

Final Drive - 11"

Total Weight - 5 cwt approx

Working Pressure - 95 PSI

Cylinder Bore - 2"

Stroke - 3"

This Engine is a little larger than our 3" Foster being scaled down from the

"Ruston" Steam Tractor, which was designed to fit within the then,

scheduled weight of the early Motor-Car Act.