icebiker Posted November 14, 2005 Report Share Posted November 14, 2005 This should be an easy one for the long-timers on this forum. I tried a search using various strings, and didn't find anything. If you could provide the formula and dimensions necessary, I'd appreciate it. I'm trying to calculate the sidecut of my current board so I know what to base a future board purchase on. thanks in advance. Quote Link to comment Share on other sites More sharing options...
RJ-PS Posted November 14, 2005 Report Share Posted November 14, 2005 Nate put up a calc here: http://www.natew.com/frame_main.cgi/software/snow/html.Main Or this one would probably work too though it is designed for skis the math is the same: http://www.math.chalmers.se/~olahe/Fri/skiradius.html I guess you get a choice! Quote Link to comment Share on other sites More sharing options...
icebiker Posted November 14, 2005 Author Report Share Posted November 14, 2005 Thanks RJ (and Nate)! Awesome! Quote Link to comment Share on other sites More sharing options...
Jack M Posted November 14, 2005 Report Share Posted November 14, 2005 R = l<sup>2</sup>/8d + d/2 R = sidecut radius l = running length d = sidecut depth you can omit the d/2 term if you want because it is pretty much insignificant. Quote Link to comment Share on other sites More sharing options...
Mike T Posted November 14, 2005 Report Share Posted November 14, 2005 R = l<SUP>2</SUP>/8d + d/2R = sidecut radius l = running length d = sidecut depth you can omit the d/2 term if you want because it is pretty much insignificant. (Excuse the math geek....) Jack - is 'l' a straight-line measurement, or cord-length measurement? is 'd' count one side of the board or both? (example - if waist width is 18 and tip/tail width are 24, is the sidecut depth 3 or 6?) and finally - how does one measure sidecut depth on a tapered board? Example: nose width = 24, wasit = 18, tail = 23 - what's the sidecut depth? Quote Link to comment Share on other sites More sharing options...
NateW Posted November 15, 2005 Report Share Posted November 15, 2005 If you want to see the math that makes my page work: http://www.natew.com/pages/software/snow/SnowboardCalculator.txt Measure the sidecut depth on one side only (3 not 6 in your example). For a tapered board, I just average the tip and tail widths. I'm actually not 100% sure that's correct, but even if it's wrong, I bet it's off by a negligible amount. Quote Link to comment Share on other sites More sharing options...
BlueB Posted November 15, 2005 Report Share Posted November 15, 2005 Jack, thanks for reminding me of that formula - I used it when I worked for an engineering company, long ago, and I couldn't remember it any more... However, there's another way, for CAD users: 1) Draw a line, same length as the running length of your board. 2) Draw a perpendicular line, long as SC depth, from the centre of the first line. 3) Use the 3 end points as the definition points for an arc (or circle) 4) Use the auto-dimensioning to read the radius. Boris Quote Link to comment Share on other sites More sharing options...
mirror70 Posted November 15, 2005 Report Share Posted November 15, 2005 I usually just make up a number that sounds reasonable. It's not like there is much variation among boards of a given length anyway. Quote Link to comment Share on other sites More sharing options...
Daneille Posted November 15, 2005 Report Share Posted November 15, 2005 It's not like there is much variation among boards of a given length anyway I've seen up to 4 meters difference in boards the same length. Daneille Quote Link to comment Share on other sites More sharing options...
Mike T Posted November 15, 2005 Report Share Posted November 15, 2005 I usually just make up a number that sounds reasonable.It's not like there is much variation among boards of a given length anyway. Gotta agree with Daneille! Coiler FC 178 = 10.5 m sidecut Burton FP 178 = 14.2 m sidecut Shred's Donek Zie scalpal 177 = 15 m sidecut 16m <= Madd 180 sidecut <= 22m depending on who you ask Quote Link to comment Share on other sites More sharing options...
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