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I'm pretty sure I've asked you this before, with no answer, but let's try again. Can you please write out your spin regulation for me -concise and in plain English would be good. And describe the test that the USGA could use to determine if balls conform to the regulation.
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I have been specifying my regulation from the beginning. My English teachers and profs always said I was a poor writer, so maybe it is my fault for not getting it across. My Ph. D. advisor said my writing was to pithy for readers to decipher without excessive digestion.
There would be no minimum spin from the driver!I believe there should be a linear relationship between club loft and spin rate. I.e., (using made up numbers for demonstration) if a ball spins 2000 rpm off of 10 degrees, it should spin 2500 rpm off of 20 degrees, 3000 rpm off of 30 degrees, 3500 rpm off of 40 degrees, 4000 rpm off of 50 degrees, 4500 degrees of of 60 degrees.
If a ball spins 3000 rpm off of 10 degrees, it should spin 3500 rpm off of 20 degrees, 4000 rpm off of 30 degrees, 4500 rpm off of 40 degrees, 5000 rpm off of 50 degrees, 5500 degrees of of 60 degrees.
If a ball spins 4000 rpm off of 10 degrees, it should spin 4500 rpm off of 20 degrees, 5000 rpm off of 30 degrees, 5500 rpm off of 40 degrees, 6000 rpm off of 50 degrees, 6500 degrees of of 60 degrees.
All of these produce a line with equal slope, which is why the simplistic numbers were chosen. It is not necessary for the same slope to hold for all balls, just that the data provides a linear relationship. My understanding is that ProV1 typically might spin 2000 from driver, and 9000 from wedge. This sort of bounds spin rates. So perhaps low spin balls would spin 2000 from driver to 7000 from wedge, and high spin balls would spin 4000 from driver to 9000 from wedge. Obviously more realistic numbers could be provided by someone more knowledgeable of the technology.
The test would need to test different swing speeds to verify the linear relationship holds for all swing speeds.
The club faces would all have the same type of surface area, probably without grooves.
There would have to be a regulation to state the slight variation allowed from true linear, because in practice you probably are not going to get exactly linear. Obviously I am not a physicist that can address the actual physical response to such testing.
The USGA would have to develop
Titanium Tiger to conduct the tests.