Hi Paul,
The Case traction engine was built many years ago for the annual Sherline contest held at the NAMES show. I'm guessing but I would say somewhere around 1994. At the time I don't believe I even had a digital camera or they were even available so there were no work-in-progress shots of the engine. Each year Sherline published the size guidelines for their contest and I took my drawings for the 1 inch scale Case traction engine and scaled them down to meet the requirements. The scale multiplication factor for the 1 inch drawings is .285 which would make the scale around 1/42 full size. As with the baler I made my own gear cutters to maintain the proper tooth count in scale for the engine driveline and water pump. It has the Woolf valve mechanism like the full sized engine. The steering works through a tiny worm drive connection and chains. The brass on the engine had started to dull with age and I wanted to clean it up for the Sherline display at NAMES this year so I used a liquid brass and copper cleaner on it. It did a good job but actually too good of a job as it exaggerated the solder joints.
Thanks for asking,
gbritnell
