Introduction: The Minnie model traction engine was designed in 1969 by LC Mason, it is a fully working 1 inch to a foot scale model of a freelance traction engine. Overall length 18" Overall width 11 1/4" Overall height 8 1/4" Weight 26 lb Estimated construction time of this model is 3,000 hours (Based on figure found on the Internet ) LC Mason say in in his book that by working to this small scale there are limitation and the design has been kept as simple as possible so there is no compensating gear, injector etc etc, in my opinion this still produced a fine model traction engine.