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Walter & Group....
[GH] Back in September, Dusty Sprague reminded me of a presentation given at Continued Education courses in Atlanta and in Florida by Mack Martin of the Atlanta School of Fly Fishing.
Mack's work on the analysis of loop sizes relative to the plane of the loop and the perspective of the observer is, in my opinion, a significant contribution to the understanding of fly casting.
Not only did Mack provide the concept, but he took it to the level of quantifying the results mathematically using basic trigonometry.
It easily explains, even without the math, why a loop which measures 3 feet in width when observed from the side when cast using a vertical casting plane (rod plane) can appear to the observer to be only about 1 foot in width when cast using an off-horizontal casting plane.
Others, in the past, had explained this by simply calling it an "optical illusion".
As you may recall, I sent out the text with diagrams before I went away, but was unable to properly send the photos because of their size.
Today, Mack placed the whole thing including pictures in a link which should make it available to those whose computers can't handle a heavy byte load.
Gordy
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>From Mack Martin :
(Sent Sept. 18, 2012) :-
Gordy:
This is some work that we did a couple of years ago. It was presented at the CE programs in Atlanta two years ago and in Florida last year. The measurements are made with a calibrated screen on an IPad and the loops are quite easy to measure at any point in the loop as it unrolls. A copy of the PP program is attached in a PDF format.
Regards…
Mack
(Today's message) :-
Gordy:
Here is the link: http://georgiatu.org/files/documents/loop_size_analysis.pdf
Our webmaster was away, so I had the link posted on the Georgia Council TU website. Originally sent on Sept.23, 2012
Please confirm receipt.
Regards….Mack
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