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.
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Thread: Fish Foil
Jul 8, 2014, 05:04 AM #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.
Jul 8, 2014, 05:16 AM #4
Jul 8, 2014, 11:33 AM #5
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.
Bump for the non-nocturnal crowd.
Jul 8, 2014, 09:28 PM #7
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.
Last edited by LBCrew; Jul 8, 2014 at 09:44 PM.
Jul 8, 2014, 09:34 PM #8
compare that to an outside rail...
Last edited by LBCrew; Jul 8, 2014 at 09:42 PM.