Parnelli's Furled Leader Formula

[Steven McGarthwaite]

See that there are a few that make their own furled leaders, and many more that use furled leaders.

This is my furled leader formula, that I came up with, using Dave Ulmer's "THE BIG LEADER FORMULA" as my guide.

This is just a demonstration, of how the my formula works!

This is just a demonstration, of how the my formula calculated!

If you cannot understand the math, just send me, a specific loop sequence and length.

I am willing to crunch the numbers, and give you the peg positions for your furled leader board.

You can contact me at parnelli@comcast.net
Subject Line: Furled Leader Formula
__________________________________________________ __________

Total length (Tl ) =Total length of finished furled leader
Total length peg (Tpeg) = Total length of furled leader layout.
Total percent (Tper) = Total Percentage of furled leader segments.

Length n (Ln) = Length of individual furled leader segment.
Percentage n (Pn)= Percentage of individual furled leader segment, in relation to P1 (which is always 100% or 1.000)

Loop sequence (two individual runs, Left/Right) = 6/5/4
Thread count sequence (two individual runs) 12/10/8
Thread Count (consolidate runs) 24/22/20/18/16

P1 = 100% =1.000
Pn = Previous segments Pn x taper percentage x correlation factor ( 1.000 x 0.55 x (24/22) =

P1 = 1.000
P1 = 1.000 x 0.55 x (24/22) = 1.000 x 0 .55 x 1.091 =0.600
P2 = 0.600 x 0.55 x (22/20) = 0.600 x 0.55 x 1.100 =0.363
P3 = 0.363 x 0.55 x (20/18 ) = 0.363 x 0.55 x 1.111 = 0.222
P4 = 0.222 x 0.55 x (18/16) = 0.222 x 0.55 x 1.125 = 0.121
Total percent =P1 + P2 + P3 + P4 +P5 =

1.000
0.600
0.363
0.222
+0.121
T percent = 2.306 = 230.6% of P1

Total length of finished furled leader = 90 inches
Total peg board layout = 90 inches + 9 inches = 99 inches

Tpeg/ Tpercentage = Lpeg1/P1

99 inches/2.306 = Lpeg1/1.00

Lpeg 1 = (99 inches x 1.000)/2.306 = 42.931 inches

L1 = 1.000 x 42.931 inches = 42.931 inches Peg left = 43 inches
L2 = 0.600 x 42.931 inches = 25.759 inches Peg right = 69 inches
L3 = 0.363 x 42.931 inches = 15.584 inches Peg left = 84 inches
L4 = 0.222 x 42.931 inches = 9.531 inches Peg right = 91 inches
L5 = 0.121 x 42.931 inches = 5.195 inches Peg l & r = 99 inches

Twist each run until each individual twisted length, reaches 90 inches

Then combine the two runs, and untwist, to created the furled leader.

The untwisted furled leader will retain it finished 90 inche length.

Use super glue (CA) on each end before releasing finished furled leader from the peg board.

You end up with a furled leader of 90 inches length, with a uniform taper of 55% where each section is precisely 55% of the mass (weight) of the previous segment.

You can change the taper up or down by 5%, but I find that 55%, gives the best casting results. Changing the taper will make the the weight to shift either toward the tip, or toward the butt of the furled leader, with furled leader segments still in porportional balance.

Once you have setup your loop sequence, and calculated the segment percentages, you should save those numbers, for all new furled leaders, using the same loop sequence but at different lengths.

This this formula is a variation of the old transmission signal antennas, used before transistors, and circuits boards, when radios and televisions had lots of tubes that could all blowup if there was feedback in the electrical circuits.

[crook33]

Whad he say?????????

[Steven McGarthwaite]

This is just a demonstration, of how the my formula calculated!

If you cannot understand the math, just send me, a specific loop sequence and length.

I am willing to crunch the numbers, and give you the peg positions for your furled leader board

You can contact me at parnelli@comcast.net
Subject Line: Furled Leader Formula

[Marco]

Hey there Steve,

My formula has been " call Jack Hise" . BUT, so far, I'm not totally sold on their use. I've tied them onto all of my rods (4) and will use them exclusively in my upcomiing Wyoming trip and hope to solidify an opinion after.

Mark

[Fly Goddess]

Steven McGarthwaite
Say I am interested in Tenkara style fly fishing. I want a 12' leader for say 4X tippet.....what would you suggest?

[Fly Goddess]

Oh I am talking about simple PEG placement. Right side/left side.
Thanks
FG

[Jack Hise]

I sort of pull my formulas out of my A..! They work so what the heck!

That should heat up this thread!!

[Fly Goddess]

I sort of pull my formulas out of my A..! They work so what the heck!

That should heat up this thread!!

I wondered what that smell was when I received your leaders for the swap

[JohnScott]

I only use thread furled leaders with rod / line weights 3, 5, and 7.

I started with a configuration 10-8-6 and proportions 40% butt section ( 10 strands ), 30% mid section ( 8 strands ) and 30% tip section ( 6 strands ). Usually use between 2' and 4' of tippet ranging from 2X down to 4X with an occasional 5X for very small flies on very small water for smaller fish. At times, between tippet to a dry and additional tippet to a trailing wet or nymph, the total tippet length will exceed 4'.

Not sure how that configuration and the proportions stack up to your formula, Parnelli.

John

P.S. When you say twist each leg until it measures 90" ( down from 99" ), how much tension are you applying during the twisting ?? If you twist the material while it is held by immovable posts, the thread will break before you reduce the length at all. If you apply no tension at all, will the leg have enough twist at 90" to be worthwhile ??

Just asking, because I always hear about the "10%" thing, which seems to be what you are doing, but no one ever talks about the amount of tension applied during the twisting process, and it seems to me that variations in the amount of tension leader to leader has to effect the characteristics of the leaders produced under different tensions.

P.P.S. I also had a question about your varnishing process which I posted on the other thread on Furled Leader Questions. Would it be better if I reposted that question here, along with the questions on floatation and stretch as desirable or undesirable qualities depending on what kind of fishing you are going to be doing with the furled leader ??

[tlerm]

Hey there Steven, I've seen your posts about furled leaders a number of times. I've been meaning to contact you with a few questions for some time. I am just getting ready to take the family on vacation, so right now is not the best time start a new conversation. I've been making furled leaders for a while now and love them. I'm intersted in a "big leader" formula to use with my 9wt and large-ish flies. I've been using the venerable Kathy Scott formula, which works great for most of my applications. But I'm intersted in something with some punch for those big flies.

I'll let you know when I get back.