I know vee increases rail rocker in the tail and understand the idea of concave(s) to flatten the center rocker without change at the rail, but what if you reversed the thinking and started with the fairly flat rocker in the centerline and increased the rail rocker full length?
In general would such a board be expected turn better on rail, have speed and paddle from the flat?
(I’m assuming the flat in the tail would have to taper to the end.)
how often is the water line operating that far forward on the board?
that forward belly may decrease the paddleability.
thats basicly how a big wave gun would be done
how often is the water line operating that far forward on the board?
Occasionally?
http://surfinside.com/Pic's%20Link/Surf%20report%20pics/2007/10-07/10-26/really-yellow-surfboard.jpg
Hmmm, I thought I read somewhere that nose belly would increase paddle-ability.
Was thinking sort of a reverse Flyer idea, instead of starting with a rocker and concaving at the stringer(center) to have flat for speed - start with flat and rocker the rails.
Anyway, seems on a surfboard design forum I might get a little more input, or at least a good ragging.
Maybe this 5-10 idea should be increased to 13 ft. 
scoop out the deck, too… you’ll have a spoon.
You’ll have to be carefull, when using V (in nose or tail) the outline will change the rail curve!
assume you have a constant V angle over the length of the board (you wouldn’t do this but it’s just for illustration). At the widestpoint the difference in rocker will be bigger, so the rail line can look weird. But that’s just for the eye, I don’t know if it’s positive or negative hydrodynamically.
But that’s the reason I believe that the rocker is flattened with concaves.
The railline will look more like this:
remeber that in the nose and tail the rails and the centerline come together (except with a square tail and nose)
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My vote - More “V” in first 12"-18," some single concave in middle, full “V” in tail @ front fins, or depending on fin set up, and board length, @ 25% of length from tail, from middle, flat to more “V’d” panels, could have a little concave in each one, with a little flat kick behind last fin if tri, or… Consider flat rocker in last 1/4 length too, speed off middle - each “side” on turn is a flat, high pressure panel - if you have some kick built in @ the same point…
Vee always squishes (technical term) water out the sides so it kills planing speed.
I have one board with continuous vee shaped for North Shore. It always held me in the lip when paddling in. But it could handle the late (over the falls drop) pretty well. It had to, since that is the only kind of takeoff I ever go on it. Slowest board I’ve ever had.
I’m sure a different rocker line and more subtle vee could help the design, but I’m tending towards almost flat bottoms with thin rails to compensate for minute vee.
PS I use the same stringer rocker for my vee and concave bottoms, so only the rail rocker varies. Seems to work well.
Red, beware the plow. I think the vee bottom can be effective with the right combination of rocker,rail and foil. Get it wrong and end up with a slow and sketchy stick.
Been there. Late drop and…bog, no fun. Edges and fin placement also seem critical to get it right. Needs juice.
I am curious what your shaper had to say about the slowest board you ever had. Those comments tend to sting for a while but offer opportunities to improve aspects of the design.
Hope he took care of you. Aloha
I am curious what your shaper had to say about the slowest board you ever had
Let’s see, the over rockered over veed board was also a superlight glass job, but intended to be a gun (go figure). Creased it really badly on my first wave at Jockos on a 6-8’ day. (In the board’s defense, I was getting worked after mistiming a top turn!)
I thank that board anfd the shaper’s attitude to my feedback for providing the motivation for me to begin designing my own. 6 years on and no regrets.
Quote:I am curious what your shaper had to say about the slowest board you ever had
Let’s see, the over rockered over veed board was also a superlight glass job, but intended to be a gun (go figure). Creased it really badly on my first wave at Jockos on a 6-8’ day. (In the board’s defense, I was getting worked after mistiming a top turn ____________________________________________________________________________________________________________________________________________________
I thank that board anfd the shaper’s attitude to my feedback for providing the motivation for me to begin designing my own. 6 years on and no regrets.
Problem solved. Never give up.