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Walter & Group...
[GH] During our recent discussions, we have seen the term, "Pre-load" used in the sense that as the back cast loop completes its unrolling and sometimes just after the loop has unfurled, that there is momentum of the line sufficient to give the caster a sense of increased resistance as he gets ready to make the forward cast. Some have opined that the same thing sometimes occurs just prior to making the back cast when false casting.
The question has been raised as to whether or not this phenomenon really provides any true rod load prior to the caster initiating the next casting stroke.
I had asked Bernd Ziesche whether anyone had done high speed video's to help settle the debate. Below, he reminds us that Aitor Coteron and Lasse Karlsson had done that with videos presented on Vimeo.
Gordy
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From Bernd Ziesche:
Hi Gordy,
yes, we have done high speed videos on pre load.
Mostly we will not have any pre load at all. It will be more about an increased line tension. And that is what indeed we can feel (I agree with you).
It is possible to produce a very slight (pre load) rod bend as well. But this seems only to happen if a serious good caster is strongly focusing on creating prelaod. And it will be very small amount.
After all I think it's quiet fair to say: Usually we do not have pre load in 95% of our casting.
In the comments to this video you find two more links to videos Lasse Karlsson made.
Best
Bernd
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[GH] In case you have difficulty opening the links to Lasse Karlsson's videos, I've placed them below:
Gordy
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[GH] Bill Kiester is of the opinion that slide loading is a fault. He describes his own experiences using it. In doing this, he refers to inertia from the backcast putting a flex into the rod which is one way of describing pre-load. I highlighted this statement in his message.
Gordy
From Bill Kiester:
Gordy,
A few year back while working on my distance I found myself feeding line into the beginning of the forward cast. I knew it felt good. And, I thought it gave me more control and set up the haul on the forward cast. I think what I am describing was slide loading. Even though I felt I was reducing my available casting arc I rationalized it by telling myself it was worth it to setup the forward cast.
I continued slide loading until my brother took a movie of me doing some distance casts. After viewing this movie I finally decided slide loading was a fault. I was loosing an unacceptable mount of casting arc. In thinking about what I was doing I decided that the underlying problem was that my backcast was not powerful enough to allow me to perform the 'give back' part of the haul going into the backcast. So, I was waiting to do the give back until my rod began coming forward. Even though both hands might have been coming forward I was bringing my casting hand forward to overtake the line hand. This allowing the fly rod to slide forward along the fly line. Or more exactly allowed the fly line to slip out through the guides on the forward cast.
My current philosophy is to have rod and line hands stopped at the maximum travel in the back direction at the beginning of the forward cast. If I am double hauling I want my line hand and casting hand as close together as they will be at the beginning of the forward cast. I also want the movement of the backcast applying some tension on the rod tip. This tends to reduce any slack in the line. And, although we don't normally think of it that way, the slack in the rod. The first few inches of flex from the rod straight do not apply very much force on the fly line. It is only after the rod takes on more flex that a meaningful force is applied to the fly line. If inertia from the backcast puts flex into the rod that adds to the available casting arc for the forward cast.
I played with an extreme example while practicing for my CCI. I found that I could pickup 40 feet of line, stopped my hands at the start position of the forward cast, shot 10 to 15 feet of line into the backcast, trap the line so that the unrolling fly line created a deep flex in the rod. This allowed my very first forward movement to be applied at full force without using any of the available arm travel.
Bill Keister
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