Probably just happened that the gearing in the inventor's setup resulted in 536 RPM, and it seemed to work. Of course, any speed in that area would "work", because you design the implement to whatever the standard is.
More curious to me is baseball- and the 90 foot base path distance, and 60' pitching distance. Both also "work"- runners are usually "out" by less than a step on a routine grounder. But when someone speedy like Ichiro of the Seattle Mariners comes along, he beats out a significant number of infield hits by being just a step or two faster. And base stealing also usually results in close plays. And breaking balls pitched make their break just before getting to the hitter, thereby fooling him.
When my daughter played 10 year old softball, her team had a devastating pitcher- nobody could hit her. Nobody intentionally threw breaking balls yet- they were still working on speed and control. Batters always stood at the back of the batters box, to get the most time possible to swing.
Opposing coach was watching each of his girls strike out, swinging just over the ball. He called time, went out and moved his batter to the front of the box. She didn't want to, but he insisted. She got a hit. From then on, everybody got a hit; it seems that the pitches were "breaking" slightly downward, and by moving the batter forward, she was getting the ball before it broke. That was pretty much the end of Brittany's pitching career.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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