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Thread: Fish Foil

  1. #1
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    Fish Foil

    Bo's and Doodbrahs,

    I've been thinking about the foils of a fish for a while, specifically the foil of the tail/cut away area. I get the outside rail foil idea and that the cut away is supposed to allow for more hold in the wave, so does the inside foil matter? I imagine it would be different if the board was concave vs. V'd.

    I can't quite wrap my head around it and have never surfed a true fish so I can't make a good judgement. Part of me is saying a hard turned down rail would work better the other is saying 50/50 might work better.

    *** I'm aware this is splitting hairs, I'm stuck in a hotel again without a rental and you'd be amazed how boring Mobile, Alabama is after dark.

  2. #2
    Looking forward to LBCrew and others to respond to this tread.

    btw, Clemmy, if you do get transport and have a night or two to get towards Floribama, let's talk.

  3. #3
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    Quote Originally Posted by EmassSpicoli View Post
    Looking forward to LBCrew and others to respond to this tread.

    btw, Clemmy, if you do get transport and have a night or two to get towards Floribama, let's talk.
    I'll let you know. Chances are slim.



    For everyone else. The title reads fish foil, not fish oil. I think we hashed out that conversation pretty well last year.

  4. #4
    Quote Originally Posted by ClemsonSurf View Post
    I'll let you know. Chances are slim.



    For everyone else. The title reads fish foil, not fish oil. I think we hashed out that conversation pretty well last year.
    Hahahaha didn't even think of that! That tread sucked bro. You just saved brewengineer 152 posts from clarifying. This one will be much better.

  5. #5
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    I have an asymmetric fish shaped by Rick Malwitz in Jersey, and the inside foil of the tail is definitely turned down hard. No 50-50. The frontside tail is a concave and the backside tail is a spiral vee, both outer rails are hard at the tail. The board does go and turns quick in soft RI surf.

  6. #6
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    Bump for the non-nocturnal crowd.

  7. #7
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    The theory is that the inside of the cutout of a true fish tail is all about the combination of hold and release. Seems like an impossibility, but think of it this way... when you put the board on a rail, you want the buried inside lobe of the fish tail to act like a fin, adding fin-like projection out of the turn. Following that concept of tail lobe-as-fin, you want the trailing edge of a fin to release water cleanly. The inside rail of the lobe of the tail becomes the trailing edge of the fin. In order for water to release cleanly, you want a thin, down rail, with a hard edge. You don't want any water wrapping around the inside rail of the fish tail, because that creates suction and drag (coanda effect). Also like a fin, the outside rail of the lobe of the tail is rounder and softer than the trailing edge. Between both rails, the lobe itself is slightly foiled, just like a fin. Below is a pic of the hard, down, inside rail.
    Attached Images Attached Images
    Last edited by LBCrew; Jul 8, 2014 at 08:44 PM.

  8. #8
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    compare that to an outside rail...
    IMG_3009.jpg
    Last edited by LBCrew; Jul 8, 2014 at 08:42 PM.

  9. #9
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    Quote Originally Posted by LBCrew View Post
    The theory is that the inside of the cutout of a true fish tail is all about the combination of hold and release. Seems like an impossibility, but think of it this way... when you put the board on a rail, you want the buried inside lobe of the fish tail to act like a fin, adding fin-like projection out of the turn. Following that concept of tail lobe-as-fin, you want the trailing edge of a fin to release water cleanly. The inside rail of the lobe of the tail becomes the trailing edge of the fin. In order for water to release cleanly, you want a thin, down rail, with a hard edge. You don't want any water wrapping around the inside rail of the fish tail, because that creates suction and drag (coanda effect). Also like a fin, the outside rail of the lobe of the tail is rounder and softer than the trailing edge. Between both rails, the lobe itself is slightly foiled, just like a fin. Below is a pic of the hard, down, inside rail.
    Quote Originally Posted by LBCrew View Post
    compare that to an outside rail...
    IMG_3009.jpg
    It took a couple re-reads and the second picture pulled it together.


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