Fascinating information. So you are saying there is really no way to ultimately know until you ride a specific board and foil combination? As a rough approximation, for a 112 x 45 cm board, how much nose and tail rocker would you want to optimize touchdown recoveries and what is the trade off for having the rocker (front and back)?TomW wrote: ↑Mon Feb 11, 2019 6:39 pmI started on. Moses T40. A monster i Never got up on.
Then a homemade stubby 4-10 surfboard conversion I spent 50 hours on. 25mm tail rocker. Worked good.
Then another home built that I folded in half quickly. Had 25mm tail rocker.
In a panic i bought a slingshot 4-6 dwarfcraft. It had negative tail rocker and very little nose rocker. I could barely ride it. It was terrible. More a torpedo than a board.
Rushed to make a 135 foilboard. It had same rocker as the one I folded. Strong and worked great with 20mm tail rocker and beveled rails.
Made a 120cm with 20mm tail rocker works great.
Made 90 and 105 with tail rocker. All work really good.
Basically tail rocker has zero influence on the board behaviour in the air or water, per se. What it does is decide the board AA in relation to the water surface, complementing the nose rocker. This influences board behaviour on surface touch down at speed and starts. It can be significant.
One thing I noticed on the slingshot dwarfcraft( several foilers on them here) is the that the slingshot foils seem to ride with much more nose-up than with my Moses foils attached. This would explain why they made a board that has so little rocker: the foil AA to the water means the boards nose and bottom are pointing upwards despite " neutral riding AA". What I'm trying to say is the foil influences the boards AA and how it behaves in touch down and starts.
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