Friction

A very interesting discussion is going on here, it’s about friction and rod design.

Friction (good kind)

Aitor Coteron (übercaster from the sunny side of the Pyrénées) shot an amazing slow motion of what really happens when the line shoots through the guides. He was kind enough to point me to it. The video, I gather, was meant as a tool for rodbuilding decisions. It’s called Guide size effect on line shooting, and I can’t embed it here, so go see it, but remember to come back for discussion!

What I take from the vid is that bigger strippers will give you more weight,  and nothing more. Line slap may be worse with smaller guides, but even then I doubt it would slow the line much.

Clearly, if distance is to be gained by fiddling with the tackle, what has to be bettered is what happens at the stripper. I think that shooting with a rod at an angle like 45, and not horizontal, should help a lot. Then, if I were a distance caster in tournament, I think I would experiment and try to find a way to coil the line properly in order to reduce random waves and collision with the stripper. Perhaps if the line was on the ground behind the caster, in line with the tunnel of guides, it would help.

 Casting porn, featuring Alex Titov

I wasn’t aware of such aspects of the casting sport, but once again Marc is there when I lack of knowledge. He says:

soft and short grass doesn’t seem to make a big difference but tarps, blankets and such are obviously better. some comps allow them, some don’t. some comps have a mandatory stripping basket which imo is always better because it’s higher and closer to the stripping guide: less distance to travel and if worn on the front, is less at an angle (more in line with the rods than a pile on the ground).
i almost always use one to fish far and it makes for easier (less effort) casting.

[…]

coils: some do and some don’t. Rajeff is pretty picky how his line is placed.

i make two piles, one in front with the line to be shot and one to my side with the carried line. nothing’s really ideal but this works for me.

Marc seems to suggest that friction is useful for line control.

 lets keep in mind that a little, or better yet, controlled friction can give better results in line control and loop formation. as a somewhat extreme example of this let’s look at the benefits of the triple haul or line check.

That’s a fascinating thought, at least because 1. I have no idea what a triple haul would be, 2. I can’t see the causal connection between friction and control, 3. hence there’s probably a new world of ideas opening before me.

And now I need a stripping basket.

4 thoughts on “Friction

  1. 1- what’s a haul ? when’s the first, when’s the second and when could we do the third ?
    2- it’s real easy and it’s most probably the major cause of all your tailing loops. dig in !
    3- several ! 😆

  2. if I got it well, haul is supposed to happen while the rod is unloading, which happens twice in a casting cycle. I’ve done some research and found a third may be added to force a snappy turnover of the leader. to me seems closer to a (very late) pullback
    Is that what you had in mind?

  3. then I have a question. if there’s a link between control and friction, what about tenkara? isn’t everybody saying that it gives you superb control?
    I imagine I could cast a frictionless rod, maybe better than my own. I am deluded?

    • The only relationship that I find between friction and line control is about loop physics.
      A simple experiment involving a glass, a string and a table top can give us some insight. Lay the glass on the table and form a loop with the string by taking it around the glass. Now you fix one end of the string to the table leaving the other end free; if you slowly slide the glass you can easily discover that loop front velocity is 1/2 fly leg velocity.
      For a cast involving line shooting loop velocity is 1/2 the difference in the velocities of fly leg and rod leg Vl = 1/2 (Vfl – Vrl).
      From that simple formula we can deduct that when fly leg and rod leg velocities are equal the loop collapses due to its velocity being zero.
      When shooting line friction with the guides is what keeps velocities of each leg being different and allows for the loop to unroll.

      Thanks for the “übercaster” title, Actually I am not that good, just trying to be.🙂

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