This is very interesting. I thought for sure someone would come up with a non friction based zero shift system for transmissions. Even if this does not turn out to be a game changer, this is exactly the kind of enterprising sort of self reliance and self worth we should be teaching in school.
I would also like it noted for the record that this guy is a plumber. I'm telling you, people who do plumbing for a long time and really udnerstand it, are smarter and more creative than any one gives them credit for. Plumbers must have a grasp of space, matter, forces, problem solving, and just plain sense to be any good at what they do.
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Sorry, but the Durnin mechanism does not actually work. If you read p. 19 of the lab report hosted on his own site
http://infinitelyvariabletransmission.com.au/wp-content/uploads/2010/05/dDrive-Transmission-Report.pdf
it states clearly that this device is not an IVT, though it could serve as a component of one. The report states that it is nothing more than an epicyclic gear set.
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