Walter....
I would take issue with your 3rd paragraph.
As I see it, loading the rod effectively does no make it stiffer. Stiffness being akin to modulus which is a property of the construct.
The same resistance does load a limber rod more deeply with greater bend than with that applied to a stiffer rod......but when that given resistance is the same, the amount of latent energy stored in the rod will be the same. Of course this is only in the event that the elastic limit of the construct is not exceeded.
Good string of information ! I'll share this end of it with the Group if you can dig out the background messages which they have not seen. Lots to be learned, here.
Gordy
From: WALTER/SUE SIMBIRSKI <simbirsw@xxxxxxx>
To: Ssadik1@xxxxxxx
CC: Gordon Hill <hillshead@xxxxxxx>
Subject: Re: What do you feel or sense at the end of the casting stroke?
Date: Thu, 06 Apr 2006 10:15:56 -0600
Server - Now that I've been educated/convinced that this is a real
affect and have had a chance to think about it I just wanted to
run a couple of thoughts by you.
The amount of kickback is dependent on rod stiffness and the opposite
of what we would call smoothness, i.e. the stiffer the rod the less
the kickback, and the smoother the casting motion the less the
kickback.
Loading a rod effectively makes it stiffer, i.e. the more you bend
it the more force is required to bend it farther, so a loaded rod
will kick back less. In a smooth, "basic" cast the caster goes through
a loading move with a smooth translation to the power snap so the
kickback doesn't occur or isn't an issue.
If the rod isn't loaded at the start of the power snap then kickback
can occur. There would be two manifestations on the line when this
happens - the first, and most common, is a concave path of the rod
tip resulting in a tailing loop. This would happen whenever the casting
stroke is too short such as when creep has entered the system and the
caster has the option of a power snap without a loading move or running
out of arm before achieving full acceleration.
The second would be when the caster does make a full casting stroke
but the loading move fails to load the rod fully due to slack in the line.
This results in shock waves in the rod leg of the line because the rod tip
path is more complicated than just a simple concave path. In this case
the rod tip kicks back and would then accelerates faster than expected
because the full momentum in the line is not there to hold it back. When the
line was jerked tight the rod would actually rebound in mid casting stroke
and then rebound again at the end of the stroke. Exactly the same tip
movement as when a wiggle cast is performed but applied during the
cast rather than as a mend. We would see this happen whenever the
caster pauses too long at the end of the casting stroke allowing the
line to sag, i.e. generate slack. This casting fault is described
in "Troubleshooting the Cast" by Jaworowski but he doesn't have the
complete description of the rod action in this case (i.e. the kickback
isn't part of the analysis). Because of this most people expect to
see a tailing loop in this case rather than shock waves.
Does this make sense?
Thanks
Walter
----- Original Message -----
From: Ssadik1@xxxxxxx
Date: Wednesday, April 5, 2006 8:16 pm
Subject: Re: What do you feel or sense at the end of the casting stroke?
> Do it with an unstrung rod and if that's all you're seeing snap a
> little
> harder with your wrist. Same type of motion you would use when
> making your a real
> cast except you have to start from rest (no creeping forward). A
> couple of
> feet isn't to much too ask for with this move -- just be sure you
> are achieving
> some significant rod deflections in the process of the wrist snap.
>