Walter & Group...
[GH] I'LL BE AWAY IN BELIZE WORKING WITH SOME GUIDES / CCI CANDIDATES FOR A FEW DAYS.
PLEASE NOTE ALLY GOWANS' QUESTIONS. TAKE A CRACK AT THEM. WE'LL ALL LEARN SOMETHING FROM YOUR ANSWERS WHEN I RETURN.
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Jim Chestnut has more comments re. Bill Kiester's challenge :
Hi Gordy,
I must have missed an email or something because I haven't got a clue what was being talked about that prompted Bill's challenge.
Also, I never know what people mean when they speak of "speed" and "velocity" , whether they are using them interchangeably or as Gordon Judd uses them, i.e.. "velocity" as a derivative of speed and direction.
This is Bill's sentence which does not compute for me:
"At RSP forces accelerating the fly line from all sources end (actually just before RSP as decreasing force equals air drag)."
The reason is because I can watch videos of a haul continuing through RSP and ending very close to, or perhaps even after, Maximum Counterflex.
This reason alone gives me pause to accept the theory.
Where am I going wrong?
Cheers,
Jim
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[GH] Jim...
We've learned enough physics along the way from our scientific guys to know that the term "Speed" is a scalar quantity meaning that it is movement over time but not directional. "Velocity" is also movement over time but is a vector quantity which means that it is directional. "Acceleration" is also a vector quantity and so must be directional. I suspect that Bill is aware of this with his engineering background.
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[GH] From Paul Arden :
Hi Gordy,
By MCF I mean Maximum Counter-Flex.
When does a loop begin to form, that's an interesting discussion, maybe at the beginning of the Casting Stroke would be one possible argument. But for many people when they mean by the point of loop formation it is the very front face of the loop and the separation between fly and rod legs. Which is generally our separation between a mend and a cast and pertained to the discussion about the conclusion of the Casting Stroke.
I don't have a huge amount to say about this subject because we don't fully understand it. It's a very interesting subject however.
Cheers, Paul
PS I've found Lasse's pic overlay.
""OK what's your definition of effective rod arc?!
[LK] "My def. is the arc in which the tiptravel results in accelerating the line towards the intended target. In the picture below I marked the point A where I think linespeed is at the highest, simply because that is where my haul ends. If linespeed is tipspeed plus haulspeed then it's at that point! At point B tipspeed is the highest, simply because that's where it has traveled the farthest in between frames, but it has left the path towards the intended target. The tiptravel inside the oval would be where the direct acceleration of the line occurs. "
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[GH]
I understand both A and B.
So far, however, I don't see how this demonstrates the start of loop formation relative to RSP (Rod Straight Position.)
Peak line speed could differ from peak tip speed due to the haul.
I think the note, " point shows here" may become the apex or leading edge of the loop and that this loop will tighten as its inertia flattens out the deformity of the rod leg produced by the great amount of counterflex.
I stand to learn.
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QUIZ
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[GH] A practical brain teaser !
Ten questions from Ally Gowans.
Let's see your answers to his questions. Ally will "correct them" and I'll send the results when I return from Belize next week :-
Hi Gordy,
Some deep thinkers out there. So much fascination with what the rod does, it’s been often said that we cast the line not the rod and considering the rod in isolation is not helpful. So I ask a few “daft” questions?
1.) Are any two casts identical?
2.) Does it matter where a loop is first observed?
3.) How would you recognise loop formation?
4.) and if it could be observed how would it help you to teach me?
5.) Defining “useful energy” as that which is the line requires to extend correctly. When does the rod cease to provide “useful energy” to the line?
6.) Is it possible for the line and rod tip to travel together without useful energy interchange?
7.) If the mass of a fly line is considered to concentrated at a single point and the rest of the line is considered weightless does this help to illustrate the location of the line launch direction?
7.) If the line is now considered to be a chain of different link sizes to replicate the taper what change does that make to your consideration?
8.) Does the line launch direction indicate where useful energisation of the line ceased?
9.) It is better but is it absolutely necessary to have a rod that bends?
10.)
Best wishes,
Ally Gowans
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