Take two, I have one draught am not happy with so I will try again!
What is a loaded rod? A bent one. If it ain’t bent it ain’t loaded. If the rod has a bend in it has to be having an effect on the line, ie, you have acquired it and started it moving in the direction of the cast. The rod does not need to have much apparent bend in it to have quite a substantial load. Think about how you put maximum pressure on a running fish, you lower the tip so that the butt sections come into play. Thats where the power of a rod is.
The initial translation may not have much, if any, rotation going on. The rod may just be translated with the tip only slightly up from horizontal, it doesn’t matter, if the rod is bent it is pulling the line. Translation is not at a constant speed, it is accelerated in the same way as any other part of the stroke, it’s just not magnified by rotation…yet.
For those of us who are not as supple as we used to be rotation will start while the rod hand is still behind our shoulder and once it starts it has to be a progressively increasing acceleration to maintain or even increase rod loading and allow leverage. It’s difficult to say when the rod is at maximum load. It’s easy to say it’s when it is at maximum bend, or chord length is at its minimum. The problem is that the rod is changing angle rapidly so load will show up in different parts of the rod as the rod rotates so minimum chord length or maximum bend may not actually be maximum load. I believe the rod loads to its maximum quite soon after rotation starts and that allows the line to be levered forward. Perceived wisdom is that leverage accounts for about 70% of linespeed, the rest is made up of the haul (10 to 15%) and PE ( the energy released by the unloading rod, 15 to 20%). It therefore stands to reason that the longer the tip path can be accelerated then the faster tip speed, and therefore linespeed, will be at RSP (rod straight position).
So in a nutshell I am saying that the longer you rotate (and accelerate) the faster your potential linespeed will be.
Having said all that I still have the dilemma that working on Late Rotation has helped improve my distance. Why? I believe that without realising it I have had to work at progressively rapid acceleration to try to achieve late rotation and that that is the key, not Late Rotation as such.
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