Tom, Hey, thanks for the promo/link in “Surfing- Speed Control- Edgeboard”. “Lee V.” aka “Newbs” has that model in his possession now. He`s probably out back playing with it in the swimming pool… http://www.thirdcoastsurf.com/
Aw shucks Dale, now I’m going to have go fix all those broken links and clean house on that site. You know, there isn’t a whole lot out there on the edge board design or thoughts along those same lines. How about revisiting that whole concept for me? I went back and looked a the Stubbie that Newbs did, the version John Mellor posted and a couple of Bob Duncan’s. Some questions: 1.is the “edge” similar in flow properties to some of the chine rails? 2.if viewed from the rear in cross section, how does the “edge” vary in shape? more concave to the rear and softening/blending at mid-point? 3.bottom contours and placement- any comments on how these can be adjusted for wave conditions types of surf breaks. 4.Hey dad! can I play with the surfboard toy after Newbs? Tom S.
Tom, Lee V. has the matching scale diagram of that model which clearly shows template, rocker and cross-sectional breakdown. So perhaps he could scan and share it. The general idea is an old one, an attempt to minimize some of the common design compromises that exist between speed and maneuverability. Incorporating rocker flex and torque, in addition to providing a means of leverage and flotation through the end of the tail. Its critical that the riders back foot/body weight arent placed directly on top of the flex tail. The rigid, kicked rear deck allows the flextail to react uninhibited. This type of design has application to shorter or longer, standing, knee and prone. From my few experiments, I also know that it doesnt necessarily need to be limited to long single fins. Such shapes are defintely geared more towards a smoother, faster, linear style of surfing in long, clean waves. Dale