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Walter & Group...
[GH] Mike Heritage answers Tim Lawson's question :
"I would like the answer(s) you would accept from a CI candidate during a certification exam if you asked for a definition/explanation of “stroke length” and “rod arc (angle)”. "
INSTRUCTING ABILITY :
21. Explain and demonstrate the casting stroke as it relates to changes in distance.
First I used the mantra, short line short stroke long line long stroke. I then put two markers along the tape about six feet apart and side cast with rsp co-insiding with the markers. I then pulled another five feet of line off the reel and showed the new position of rsp on the tape and how I had to increase my casting arc because the extra weight of the line plus the slightlly more power I had to apply the rod loaded deeper which meant I had to increase my casting arc to maintain straight line path and keep my loops tight.
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[GH] Robin Brown sends her answer :
Gordy:
here is what I understand regarding the two terms, stroke length and rod arc: One mimics the other. If you have a longer stroke length, then you also have a wider rod arc to maintain the straight line path of the rod tip. So, long cast, long stroke length and wider casting arc; short cast, short stroke length and shorter casting arc. My question here is are there exceptions to the above?
I believe the arc also depends on the rod action. So with a slow-action rod one would use a longer arc. With a fast rod, one would use a more narrow arc.
The definition of rod arc as I understand it is “the angle of change at the rod butt between the back and forward casts and vice versa”. I think of stroke length as “the distance your hand moves the rod butt”.
Robin
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[GH] Mark Surtees answers :
Hi Gordy
In the simplest possible terms:-
Rod Arc or Angle or Casting Arc or Angle is the angle through which the rod rotates during a Casting Stroke.
Casting Stroke Length is the distance over which the rod has translated (moved without a change in angle) during a Casting Stroke.
Increasing Casting Angle allows you to apply more force for longer.
Increasing Casting Stroke length has the effect of “flattening” the arc and increasing the length of the chord subtended by any given casting angle.
Increasing either of these will increase the distance travelled and/or velocity of the rod tip, either of which increases the amount of work you can do to the line and so increases the amount of line you can cast.
Mark
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[GH] We have two problems going on, here.
1. The level of testing between CCI and MCI.
a. I'd have accepted the answer which Tim says he received as a basic understanding of the principles and the demonstration matching the simple explanation. OK on a CCI exam, in my opinion.
b. On a Masters exam, I'd expect the answer to be much the same. Then I'd likely request a much more detailed explanation. Here, I'd be looking for in depth understanding beyond the expected level of a CCI candidate. That would include things such as matching the rod load / rod bend to the casting arc along with a reasonable description of each.
2. Asking for definitions as we test :
We have pointed out that as yet we have no agreement, let alone consensus on specific definitions between the various glossary committees and those who offer their personal "definitions".
This is why we have been working to achieve better commonality of description as we try to come up with accepted definitions. It will make testing a lot smoother once we have done that.
As we discuss these things, I begin to see a "light at the end of the tunnel". Most of those discussing our basic definitions are proceeding pretty much along similar pathways. The detailed wording remains the stickler.
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