Acceleration / SLP

"Some are suspicious of the electronic readouts and
interpretations, especially when it comes to the concept of unchanging /
CONSTANT acceleration needed for nearly SLP of the rod tip and tight loops."

When I first heard about constant acceleration being an attribute of the casting strokes of elite casters, I wondered - why is this? Well after some thought, it is now my belief that the relationship between constant acceleration and SLP is the ultimate confirmation of Bruce and Noels work.

This is my thinking: For a flexible rod tip to follow a straight line it seems to me that it would require a constant force pulling back on the rod tip. Variable forces would obviously detract from a straight path. Based on Newton's 2nd Law of motion ( net force = product of mass and acceleration), only constant acceleration (assuming unchanging mass) will produce a constant force, which in turn helps the caster to achieve SLP with the rod tip.

If one believes that non constant acceleration is more congruent with SLP, then one would have to account for variable forces producing a SLP of the rod tip - and that seems much tougher to me.

The link between acceleration and rod bend is a force. Forces have to be taken into account in the understanding of things with changing motion.

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Looking at it a different way, I note that acceleration of the rod tip against an unchanging resistance (the inertia of the fly line) is needed for rod load and rod bend. No acceleration : no rod bend. Constant velocity : no rod bend.

The greater the acceleration, the greater the rod bend. It would seem, then, that constant acceleration would yield, "constant" or unchanging rod bend.

Could it be that certain compensatory hand movements could result in SLP even if we had increasing acceleration ?

It was this thinking that had me teaching the concept of, "accelerated acceleration" until this was dispelled by Bruce and Noel with their findings and conclusions.

I do think Bruce and Noel are correct. Not easy to argue with hard data well matched to elite casts.

Your statement: " ..... the relationship between constant acceleration and SLP is the ultimate confirmation of Bruce and Noel's work" is one way of viewing it. My own feeling is that it is the ultimate conclusion, not confirmation.

As I see it, true confirmation would come from other investigators arriving at the same conclusion using different methods of measurement. That is what I meant when I wrote to Bruce stating that it is like using two different methods of navigation to arrive at the same destination.