>>> The concavity increases the tau, relative to the rest of the bottom of the > board. As a result, in the area of the concave both the upward force and > drag is increased, at least that is my interpretation. I think of a concave more as a way of focusing lift while keeping drag to a minimum. Think of it as a satelite dish focusing all the forces into a point(or in this case a vector). Also, a surfboard is normally convex(rocker). Why would a concave create more drag the the convex of the rocker? regards, Håvard
>>> What the hell is happening on the tail!!!!????? Newbs Please see the new thread, Rocket Science: Flow Across the Tail. I'm not sure what's up here, but this thread seems to have been altered, at least the posting which I originally responded to seems to have vanished. I also thought I posted a big rant on Newton's Third Law and the Conservation of Energy. I could be mistaken, anyway I get into tail contours in the thread mentioned above. Kevin
>>> The concavity increases the tau, relative to the rest of the bottom of the > board. As a result, in the area of the concave both the upward force and > drag is increased, at least that is my interpretation. I think of a concave more as a way of focusing lift while keeping drag to a minimum. Think of it as a satelite dish focusing all the forces into a point(or in this case a vector). Also, a surfboard is normally convex(rocker). Why would a concave create more drag the the convex of the rocker? regards, Håvard
>>> What the hell is happening on the tail!!!!????? Newbs Please see the new thread, Rocket Science: Flow Across the Tail. I'm not sure what's up here, but this thread seems to have been altered, at least the posting which I originally responded to seems to have vanished. I also thought I posted a big rant on Newton's Third Law and the Conservation of Energy. I could be mistaken, anyway I get into tail contours in the thread mentioned above. Kevin
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