Bordy Posted November 16, 2003 Report Share Posted November 16, 2003 Does any one know or have the formula for Tip, Waist, Tail measurments to Radius? Quote Link to comment Share on other sites More sharing options...
Guest Ken B Posted November 16, 2003 Report Share Posted November 16, 2003 Nate has an on-line calculator here: http://www.natew.com/frames.cgi/software/snow/html.Main Click on the link for reverse engineering of snowboard geometry. -Ken B Quote Link to comment Share on other sites More sharing options...
Jack M Posted November 16, 2003 Report Share Posted November 16, 2003 There is a simpler one that I forget, but I just doodled this out on a napkin: R = X / (sin(180 - 2(arctan X/Y))) X = half the running length Y = sidecut depth Quote Link to comment Share on other sites More sharing options...
Guest John Posted November 16, 2003 Report Share Posted November 16, 2003 If you don't like trig an even simpler formula is: sidecut radius = (L^2)/(8*d) + d/2 Where L = running length (distance between the two widest parts of the board) d = sidcut depth all measurements are in meters, so the sidecut depth will end up as somthing lile 0.02m (1cm = 0.01meters) Quote Link to comment Share on other sites More sharing options...
tilledog Posted November 17, 2003 Report Share Posted November 17, 2003 You don't have a turn radius on your boards and neither does yo mama. They're all straight so actually, I guess you do. Infinity!! (+1) How's the pow pow up there? Davo Quote Link to comment Share on other sites More sharing options...
Mellow Yellow Posted November 17, 2003 Report Share Posted November 17, 2003 ok.... my head hurts now..... Quote Link to comment Share on other sites More sharing options...
Jack M Posted November 17, 2003 Report Share Posted November 17, 2003 Originally posted by Bob Jenney Not to point out the obvious, but y'know boards don't have a "radius" per say? A side cut is made up of a parabolic curve. Manufactures use the word radius because it’s easier to communicate. Actually many mfr's use radial sidecuts, Burton for one. Some use parabolic (quadratic), some use elliptical, some use a blend of multiple radii, etc. -Jack Quote Link to comment Share on other sites More sharing options...
Tim Posted November 17, 2003 Report Share Posted November 17, 2003 Uhh, it may not be very obvious, but the difference between an parabola and a true radius is very small, less then 0.02 mm (0.001") for a board of common dimensions (length/radius ratio). I still haven't met the guy who can sharpen my edges to this accuracy. You can also forget about the +d/2 in the simple formula (neglectable), also: R=L^2/(8*d) Which accidentally (well, actually not accidentally) is the exact formula for a parabolic sidecut. Tim Quote Link to comment Share on other sites More sharing options...
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