I just finished an 8'4" with shallow rear rocker and 3.5" front rocker. Bottom has slight V, about 1-2 degrees on both sides, and has Pro-Box system for side bites. It's fast and good on our normally choppy waves. Turns sweetly and rather easy to take late takeoffs.
Problem is that I can not use it in long board competition, longboards are defined as 9' +, so am scaling that spar into a 9'0". I added another number 4 rib with gave me the 6" I needed. It also has what we call 'Evo" rib pattern, more like an Aleia style foil, only something you can do in wood. Because of the foil being like an Aleia, it turns well with little effort and that combined with 1 3/4" tail rocker give it drive right from drop in.
Board specs: 9'0" 23" wide, 3 3/8 thick, 17" at nose, 15" at tail, 8.5" tail. Rocker 3 1/2" front, 1 3/4" rear.
Slight V about last 1/3
About 50/50 first 1/3
80/20 mid 1/3
Hard last 1/3
Weight: 18.5 pounds
4 oz glass top/bottom with Green Room epoxy.
Nose and tail blocks cedar and balsa
Board is all cedar
Above shows ribs going to spar. Kicker here is to keep the ribs at 90 degrees to spar while glue dries. Picture on right is drawing an outline around board to trim excess off. If I don't do that, clamps will not fit.
Laying in first rail (3/8" square) to get outline of future foil structure. Because there is a slight V in bottom I have to place angled wood strips, next will be 1/2" x 1/4" then a 3/4" x 1/4" then decking strips. Right picture shows first deck strip. Of course it will be matched to the other side, found this one has beautiful grain patterns.
Second center deck strip being glued in (I need more clamps :) Right side, "All clamps on Deck...even the runts".
Below is how I mark out where the fin box backing in installed. I use balsa for blocking. On right is after removing set up jig for V bottom and gluing braces. Finally starting to look like a board.
|Off with nose and tail.|
|Blocking for FCS side bite plugs|
|Last deck strip glued in place.|
|Tail and nose block, cedar and balsa.|
|Nose block glued in place.|
|Love when it matched perfectly.|
|Laminating coat. |