Walter & Group.....
I'm back. You will recall that I asked a question about the difference in the acceleration of the fly line loop when a LEVEL LINE is used compared with that with a TAPERED LINE.
Here are a couple of the replies ( Way too many to include them all. ):-
From Jim Valle:
Gordy & Bruce,
Here is what I wrote with inserted responses.
I would answer that the fly line actually speeds up as it completes it roll
out due to the taper of the fly line. (See Bruce Richards, Modern Fly
Lines)(should have typed see also, Bruce Richards… ) Basically as the mass of the line reduces the KE is converted to
increased velocity which causes increased friction and heat thus the
forward taper dissipates energy, (My understanding from reading Bruce’s book)(Note: the absence of “Quotation Marks” or a specific cite.)
with the proper amount of energy applied by the caster for the amount of line being carried the perfect cast will
end at "0" ie the fly will turn over and there will be no remaining energy to "pop". Totally my theory
Gravity has been working on the line throughout the entire cast, it has
just been balanced by the total energy equation in the cast it will appear
to take over as the line straightens and drops the line. Always been my belief, similar to Lift, Thrust, Acceleration, Velocity balance in aviation.
Jim Valle
I first of all wanted to make the point for those studying for their Masters that the taper speeds up the line due to reduction in mass. A more important point in my opinion.)
Secondly just like gravity I would assume the line starts to slow from friction (technically speaking)immediately after the Tip’s furthest extension in the direction of the cast (RSP+)(J). However when I cast fast, slow or even long distances I don’t sense any significant decrease or change in the line’s ground speed or loop turnover speed except for the speed up at the line taper and leader. (I believe the thrust applied at Take off, Launch or RSP+ exceeds all the other contradicting forces throughout the cast and that the change in line mass is the significant change)
So Have I intuitively come up with something brilliant? J (Remember; like a good cast be kind and gentle!)
Jim V
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Comment: I agree with your discourse. You have, however, evaded the answer to the question of what is the difference when a LEVEL LINE is used ? Gordy
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From Bruce Richards :
****The top leg of the loop of any line reduces in mass as it shortens,
of
course. The only real difference between level and tapered lines is
that
level line top legs don't reduce mass as quickly because they don't have
a
taper. This just delays acceleration (and increased wind resistance)
until
much later and results in the big kick that we experience with level
lines.
Inefficient energy dissipation due to lack of taper.
Bruce
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Comment: Bruce has given the perfect MCCI exam answer. I used to think that the fly line taper was essential for loop acceleration because of the heavier line always turning over the lighter line in front of it resulting in the mass of the heavier line being converted exponentially into velocity as the taper narrowed.
..............BUT.. when I went out and cast with a level line, I noted definite acceleration of the loop ... just not as much. Then it kicked over as the loop straightened.
WHY ?
Bruce has explained it very well. It is because you still have a decreasing mass of line as the fly (top) leg of the loop gets shorter during the travel and unfurling of the loop !
Gordy
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NEW QUESTION: What do you think would happen if we made a fly line with a reverse taper such that the line became thicker and heavier as we went from the belly to its tip .... (same leader and fly) ?
Gordy
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