The Analyzer
Interesting. I understand the first two little charts on the sexyloops page above, and assume that "Pd=" must mean total elapsed time, but I have no idea what the bottom large chart means, much less how to interpret it.
I would need a video explanation of the two separate types of charts derived from the same casts to be able to understand what they mean.
I wonder how much that setup costs? It would certainly be fun to compare the charts to the old time way - by observing the results of the cast.
"Further analysis
The top chart shows tip speed, of a "normal" good med. dist. cast. Both fore and back cast speed is charted above the 0 line. The chart below shows both rod butt acceleration (solid line) and rod flex (dotted line). I've drawn vertical lines down from max tip speed so you can see what the rod butt is doing and what rod flex is at that point. The charts may not be lined up exactly so there will be some minor error, but you get the idea. I believe that the first and third tip speed peaks are back casts, the middle is a fore cast. Lots of variables, hard to develop many firm, fast rules.......
top: tip speed vs time
bottom: rod butt angular velocity (solid) & rod flex (dotted) vs time"
No video but this is how I interpret the graphs above.
So the top chart is fly rod tip velocity. The are three complexes. The writer assumes that the first complex is a backcast then a forward cast and then a backcast. Notice that the first and last complexes show a higher peak velocity. Since most casters develop a higher velocity on the forward cast, I think the graph is a forward cast, backcast, and forward cast.
The lower graph has a directional component to the Y (vertical) axis. So the graphs of rod butt angular velocity (solid) & rod flex (dotted) lines can cross each other.
Notice that the rod butt acceleration is graphed in the opposite direction as the rod flex. So the greater the rod but rotation (acceleration), the greater the rod flex, which is what one would expect.
When the rod butt stops accelerating (the solid line reaches the mid axis), the rod counter flexes, and the dotted line (rod flex) crosses the solid line (rod butt) because the rod flex is in the opposite direction. Then the rod straightens from the counter flex, and both rod butt and rod flex line touch and are at zero as the fly line loop is traveling and the fly line is straightening.
Then the opposite direction cast is begun and the sequence of rod butt acceleration and rod flex begins anew withe the rod counter flex at the stop. Etc, etc.
