Jack M Posted March 27, 2009 Report Share Posted March 27, 2009 A number of people are asking what this is about, so, here are a few thousand words on that: (click to enlarge) Traditional nose: <a href="http://www.jmphotocraft.com/bomber/nose_decamber_01.JPG" target="top"><img src="http://www.jmphotocraft.com/bomber/nose_decamber_01.JPG" width="600"></a> Decambered nose: <a href="http://www.jmphotocraft.com/bomber/nose_decamber_03.JPG" target="top"><img src="http://www.jmphotocraft.com/bomber/nose_decamber_03.JPG" width="600"></a> Traditional nose, middle of board flat on ground: <a href="http://www.jmphotocraft.com/bomber/nose_decamber_02.JPG" target="top"><img src="http://www.jmphotocraft.com/bomber/nose_decamber_02.JPG" width="600"></a> Decambered nose, middle of board flat on ground: <a href="http://www.jmphotocraft.com/bomber/nose_decamber_04.JPG" target="top"><img src="http://www.jmphotocraft.com/bomber/nose_decamber_04.JPG" width="600"></a> What I believe the decambered nose does, is it becomes part of the sidecut when the board is tilted on edge. It works <i>with</i> the sidecut instead of against it. The upward curve of the nose more closely matches the curve of the sidecut and the shape the board assumes when the whole thing is decambered in a carve. As you can see in this picture, when a board is carving, the nose is engaged in the snow <i>well past</i> the end of the so-called "running length" of the board: Therefore the upturn of the nose becomes an active part of the sidecut and an active participant in the carve. A traditional nose shape that curves up abruptly will "plow" through the snow because it is trying to turn along the upward curve of the nose - a much tighter arc than the rest of the board. A low, decambered nose will "slice" through the snow better because its curve is more inline with the sidecut. The decambered nose does not result in a huge reduction in effective edge length, because the board is still engaged in the snow along most of its length as we can see here: However the nose is now "unloaded" and not fighting the sidecut or the forward movement of the board. Also the decambered nose helps with bumps and imperfections in the snow surface. Any impact to the nose of the board as it is carving will be more abrupt with a traditional nose, because the nose upturn is more vertical and curves up at a tighter radius. The nose has to climb up over the obstacle more quickly, in a shorter length of board travel. This creates a shockwave that travels down the board, compromising edge hold and possibly upsetting the rider. You can imagine an extreme example of a nose that quickly curved up to be perpendicular to the board - something like that could actually stop the board in its tracks. The decambered nose spreads the impact out more gradually, and the whole front of the board has more time to deflect more gently. Quote Link to comment Share on other sites More sharing options...
tex1230 Posted March 27, 2009 Report Share Posted March 27, 2009 nice work Quote Link to comment Share on other sites More sharing options...
Surf Quebec Posted March 27, 2009 Report Share Posted March 27, 2009 Thanks Quote Link to comment Share on other sites More sharing options...
Zone Posted March 27, 2009 Report Share Posted March 27, 2009 Just a bit of fun here, these were 2001-2002 early Swoard days, when the nose and flex of the Swoards were thought to be ridiculous. What's out of fashion will come around again. http://www.extremecarving.com/photos/02html/p08_02.html http://www.extremecarving.com/photos/01html/j3_01.html http://www.extremecarving.com/photos/01html/j7_01.html Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 http://www.extremecarving.com/photos/01html/j3_01.html That is one good looking outfit!! :D Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 Here is a picture of the whole board so you can see how the decambered nose relates to the camber of the rest of the board: <a href="http://www.jmphotocraft.com/bomber/nose_decamber_05.JPG" target="top"><img src="http://www.jmphotocraft.com/bomber/nose_decamber_05.JPG" width="600"></a> Quote Link to comment Share on other sites More sharing options...
Zone Posted March 27, 2009 Report Share Posted March 27, 2009 That is one good looking outfit!! :D Would go well with these... http://www.boardzone.com/snow/shop/snowboard-bindings/burton/cartel-est-magenta-madness-2009/index.cfm :lol::lol: PS: 50% off everything in that store right now! Quote Link to comment Share on other sites More sharing options...
Dave ESPI Posted March 27, 2009 Report Share Posted March 27, 2009 in other words, the nose is not as steep of an angle for the up turn.... A lot of powder boards had long progressive noses like this. The only concern is the board becoming a catapult if the front gets too weighted and sinks deep in snow and jams to a stop..... "BOINNGG !" kinda like riding switch... and catching your tail LOL. Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 By the way, those hardwood planks are 2.25"/5.7cm wide. Quote Link to comment Share on other sites More sharing options...
Gecko Posted March 27, 2009 Report Share Posted March 27, 2009 Thank you Jack that 1000 words explained it in perfect detail for me:biggthump Quote Link to comment Share on other sites More sharing options...
carvedog Posted March 27, 2009 Report Share Posted March 27, 2009 Good blog. Quote Link to comment Share on other sites More sharing options...
KingCrimson Posted March 27, 2009 Report Share Posted March 27, 2009 Ignore the noses, look at the focus and DOF in those pictures! Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 Ignore the noses, look at the focus and DOF in those pictures! 1D-IIn + 24-70/2.8L, baby. Like going fishing with a howitzer. Quote Link to comment Share on other sites More sharing options...
powdahbonz Posted March 27, 2009 Report Share Posted March 27, 2009 is this the mystery board-what is this? Here is a picture of the whole board so you can see how the decambered nose relates to the camber of the rest of the board: Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 is this the mystery board-what is this? Coiler NSR 185. I'm borrowing it from bschurman, the guy in blue in the pic. 160Z won't be tested until next season. Quote Link to comment Share on other sites More sharing options...
Steph Posted March 27, 2009 Report Share Posted March 27, 2009 The only concern is the board becoming a catapult if the front gets too weighted and sinks deep in snow and jams to a stop..... "BOINNGG !" This is what I cannot get past here (I realize that trying is believing). Haven't demo'd any new boards in a while, but I'm thinking of purchasing something for next season. I know that I put a lot of pressure on the nose of the boards that I ride, and would be worried about burying it with a board such as a Schtubby or NSR. I also see the people that are riding these decks and can't imagine that would be the case for me, if they are not. True??? Quote Link to comment Share on other sites More sharing options...
BlueB Posted March 27, 2009 Report Share Posted March 27, 2009 Decambered nose tends to float back to surface. As well gradual raise low long nose of pow board. Quote Link to comment Share on other sites More sharing options...
philfell Posted March 27, 2009 Report Share Posted March 27, 2009 Good write up Jack. I'm sure it helped a lot of people here understand the concept better. Quote Link to comment Share on other sites More sharing options...
pokkis Posted March 27, 2009 Report Share Posted March 27, 2009 Bruce has made nice "ladies" version of 168 NSR for my wife, and it looks that she has now new fafourite board. She is very happy with it, no problems with nose or with multi radius. Quote Link to comment Share on other sites More sharing options...
Mike T Posted March 27, 2009 Report Share Posted March 27, 2009 I know that I put a lot of pressure on the nose of the boards that I ride, and would be worried about burying it with a board such as a Schtubby or NSR. I find the decambered noses are harder to bury. Granted, I'm not riding much else these days - but when I go to anything else I feel like I'm about to bury the *those*. Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 This is what I cannot get past here (I realize that trying is believing). Haven't demo'd any new boards in a while, but I'm thinking of purchasing something for next season. I know that I put a lot of pressure on the nose of the boards that I ride, and would be worried about burying it with a board such as a Schtubby or NSR. I also see the people that are riding these decks and can't imagine that would be the case for me, if they are not. True??? When the board is up on edge, the upturn actually has little to do with terrain clearance. You could theoretically carve a board with NO upturn, just a flat, rounded nose. But it would catch between turns when the board is flat on the ground! Quote Link to comment Share on other sites More sharing options...
Steph Posted March 27, 2009 Report Share Posted March 27, 2009 Thanks Jack and Bola! Ok, makes total sense now. It sure would be nice to not have to work so damn hard all the time:lol: Quote Link to comment Share on other sites More sharing options...
pokkis Posted March 27, 2009 Report Share Posted March 27, 2009 Steph, try to find one of those "smaller" NSR's there for test ride, i think you will love it. Quote Link to comment Share on other sites More sharing options...
Surf Quebec Posted March 27, 2009 Report Share Posted March 27, 2009 What NSR means ? Quote Link to comment Share on other sites More sharing options...
Jack M Posted March 27, 2009 Author Report Share Posted March 27, 2009 What NSR means ? New School Race. Bruce, what's my commission up to? ;) Quote Link to comment Share on other sites More sharing options...
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