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But secondly, by further flexing the rod one is effectively SETTING BACK to a degree the casting arc, or, stated in the opposite, EXTENDING IT OVER A LONGER ARC, and TIME, and at GREATER FORCE! BOOM!
Note the tradeoff between increased flexion and Force. A faster tapered rod will, at that flexion, increase Force more than flex further…which will give an increased acceleration but less increase in casting arc and time. A softer or slower taper will have less increase in Force but an increase in flexion…larger arc and potentially more time.
And, many people can haul seriously further than 2 feet!
Just as with the singular, single handed force during loading, it is possible to apply the force too rapidly and “shock load” the rod, especially the rod which is flexing more. It is highly likely that the ideal haul motion is ALSO a steady accelerative force that blends in with the acceleration already occurring from the rod hand in a way that is both unique to that rod’s flexion/taper characteristics and ideal in terms of maximizing arc and time in the acceleration phase. SKILL!!
It would/will take high speed photography and/or pressure or force sensors to actually sort this all out. But clearly, all this is happening to SOME degree, and in a way modulated both by how one hauls and by the flexion characteristics of the rod AT FULL (one handed) FLEXION when the haul begins.
But that is not the end of it. There is a third model which kicks in to the degree that the rod does NOT flex.