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Thread: BIG FURLED LEADER FORMULA - Readers cast (Steve McGarthwaite) - Jan 30, 2012

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    Default BIG FURLED LEADER FORMULA - Readers cast (Steve McGarthwaite) - Jan 30, 2012

    BIG FURLED LEADER FORMULA


    I created the Big Furled Leader Formula, after about 4 years of working on the mathematical formula, and then I gave it to the world for free use by all the people who make their own furled leaders. So if you want to created a furled leader that has a loop sequence of 13?-12?-11?. That gives you total thread count for the combined thread segments sequence count would be 26-24-22-20-18.

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    Ron:

    I realized did a major typo, on the article

    Each Run (Left & Right) have a loop sequence of13?-12?-11? that is correct.

    That gives each Run a thread count of 27-25-23 which gives the total thread count combining the Left and Right Runs

    54
    52
    50
    48
    46

    I will correct the mistakes and send your the corrected copy... to replace this one with errors

    I have been tired and trying to do too much with saving FAOL Articles as pdf. and running the Beginner's Only Swap...

    I have not done any furled leader in the past 5 months, so I apoligize for this major error...

    ~Parnelli
    "Everyone you meet in life, give you happiness! Some by their arrival, others by their departure!" ~Parnelli

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    I created the Big Furled Leader Formula, after about 4 years
    of working on the mathematical formula, and then I gave it to the
    world for free use by all the people who make their own furled
    leaders. So if you want to created a furled leader that has a loop
    sequence of 13?-12?-11?. That gives you total thread count for
    the combined thread segments sequence count would be 54-52-50-
    48-46.

    I use a two line method, I know most of you use the V shaped
    layout that Kathy Scott shows on her DVD Video, but that gets a
    little to complicated for my furling. One plus for my method is I
    can always delete a peg position (eliminating the last segment) at
    the tippet end for a more stout furled leader/tippet combo. I also
    can start and end my loop wraps on the inside pegs for a different
    loop sequence of 13-12?-11.

    I have a lot more options in creation of my furled leader
    designs. I mostly use Mercerized Cotton Thread for my furled
    leaders, it is very strong thread, and not that expensive, available
    lots of different colors and shades. Tag ends at the start and finish
    are secured to the outside pegs. I can also secure them to the inside
    pegs then it would be a 13-12?-11 sequence lot of other options
    using the two run system.

    I furl each side separately reducing the board length by 10%
    for the left and right runs tacking the small ends to the board. I
    then transfer the left run on top of the right run, to start the
    unfurling process.

    I add super glue to the loops at the top and bottom before I
    do the shorb loop for final end connections. For the shorb loops I
    use a Knit Picker (they have them at Jo Ann's Fabric and Michaels
    they only cost about $2.

    Example: 13?-12?-11? loop sequence
    PERCENTAGES:

    L0 & R0 = 0
    L1 = 100% = 1.000
    R1 = 1.000 x 0.55 x 54/52 = 0.571
    L2 = 0.596 x 0.55 x 52/50 = 0.327
    R2 = 0.358 x 0.55 x 50/48 = 0.187
    L3/R3 = 0.217 x 0.55 x 48/46 = 0.107

    Total Percentage 2.192

    Finished Length 72 inches

    10% of Finish Length added to formula for length lost in
    furling process
    72 inches + 7.2 inches = 79. 2inches (79 inches)
    1.000/2.192 = L1/79.2 inches so L1 = 36.1 inches round
    down to 36 inches.
    PEG POSITIONS
    L1 = 36.1 inches
    R1 = 36.1 inches x 0.571 = 20.61 inches
    L2 = 36.1 inches x 0.327 = 11.80 inches
    R2 = 36.1 inches x 0.187 = 6.76 inches
    C3 = 36.1 inches x 0.107 = 3.86 inches

    Peg Positions
    L & R Pegs 0"
    L Peg 36"
    R Peg 57"
    L Peg 69"
    R Peg 75"
    C Peg 79"

    You can use that Percentage Sequence for whatever length of
    furled lead you wish that has that loop sequence. So half the work
    is already done. You can use that percentage for different lengths
    of finished furled leaders using that loop sequence/thread count

    Once I have done the shorb loop, I like to dip my furled
    leaders in some warmed lacquer, to help the thread to bind giving
    the furled leader a backbone when casting.

    I hang them up to dry, and before they are fully cured I use a
    damp rag with some lacquer to smooth the exterior of the furled
    leader to remove any lacquer build up….

    I don't use spread sheets, I just do my two part calculations
    Percentage base of the first length, and then add the 10% to the
    desired length to compensate for the loss due to the furling
    process. The finish furled leader should be within +/- 0.1 inch of the desired length…~Parnelli

    Again my apoligies for the flawed articles, I have had too many pans in the fire this week...
    Last edited by Steven McGarthwaite; 01-30-2012 at 07:13 AM.
    "Everyone you meet in life, give you happiness! Some by their arrival, others by their departure!" ~Parnelli

  4. #4

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    I do use spreadsheets, here you can download a spreadsheet of Steves formula http://dl.dropbox.com/u/1418258/BFLF.xls I mostly use it for the V-setup. Like Steves formula, feel free to use it, and of course comment on it.

    Karel

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    WOW!! I am impressed with the work that went into this. But What Ever For!!??

  6. #6

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    First wanted to build an atomic bomb in my back yard, but my wife wouldn't let me. So i choose to build furled leaders with a hint of science to it. Or more seriously, the aim of this whole thing is to get leaders which behave similar for different lengths, line weights etc. Don't know if the aim is reached, but it was fun pursuing it.

    Karel

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