My email should be shown in the left pane. The first one being a throw away, if it turns into a dog.Īllan, I'd love a copy of your APS file. I'm preparing to order enough foam for 3 boards. I'm about to start on my 14 ft garage made race boards. Let me know your thoughts so that our tribal knowledge may grow.ĭave this thread is a dream come true for me. The point is to begin sharing our gifts with each other. How may of us have the resources to do this? Even if we do (which I do) some knuckle-head on a handmade surfboard may still beat us.Īll of this is my opinion and may run counter to the opinion of others. The theoretically correct way to design a flat water racer is to take several iterations of our best designs, model them three dimensionally in a CAD program, run the CAD model through a computational fluid dynamics program, CNC machine the board, glass it and then go test the bloody thing. It is only through trial and error and feedback from customers that I've made these observations. Keeping the center of gravity as low as possible by cutting into the deck or making the board thin is important.ĭisclaimer: I pride myself in making boards that ride waves really well. Keeping the wide point 2" ahead of center and converging with the thickest part of the board works well.ġ2. We cut deep double concaves in the back 1/3rd blending them into the front concave and off the tail.ġ1. We cut a concave in the center of the vee from nose back 2/3rds of the board length.ġ0. We've found flat bottoms are slow and round bottoms have a maximum hull speed that, while consistent, may not be the fastest thing going.ĩ. We run a full V through the entire length of the board. 4" to 4 1/2" of nose rocker and 3 1/2" of tail rocker seems to work well.Ĩ. A very gentle slope in the entry rocker blended back from the nose 2/3rds of the length of the board reduces water pushing.ħ. Keeping the foil forward of center is faster.Ħ. Wet sanding the bottom and rails with 320 grit adds as much as 10% to 20% more hull speed.ĥ. ![]() Pinched rails make for less free-board allowing chop to splash over the deck vs. Remember water follows curved surfaces the less curve the less water drag.ģ. Keeping the rails very thin and pinched as opposed to thick and boxy makes a huge impact on how much drag is placed on the rails. ![]() Other things are more important than outline.Ģ. Pointed outlines don't necessarily correlate with high speed they simply cut through wind and chop better. What angered him was the fact he had just spent $4,000.00+ (US dollars) for a 14' carbon-fiber flat water race SUP only to be smoked by a guy on a surfboard. In fact, I recently received a call form an angry individual in Lake Tahoe who complained because a buddy of his raced past him on one of our 10' surf-style SUP boards. I've received many questions about the best design for distance paddle / race boards.
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