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capetonian
Joined: 11 Aug 2006 Posts: 1197 Location: Florida
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Posted: Sat Oct 31, 2020 11:52 am Post subject: What determines maximum sail size for a board? |
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Fanatic Mamba 104 L 224 cm long 60.5 cm wide - max sail size 6.8
Quattro Cube 106 L 226 cm long 62.5 cm wide - max sail size 6.0
Severne Pyro 105 L 226 cm long 62.5 cm wide - max sail size 6.7
Exocet X-Wave 103 L 224 cm long 63.5 cm wide - max sail size 6.8 |
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NOVAAN
Joined: 28 Sep 1994 Posts: 1551
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Posted: Sat Oct 31, 2020 12:36 pm Post subject: |
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Water conditions, body weight type of board. Also wind conditions. Big gusts or big lulls.
Lots of people are having more fun on bigger boards and smaller sails. Unless your in really steady winds sinker boards are a lot of work. Also if the wind drops the bigger board is easier to get back to the launch. I'm 165 lbs and sail a 3S 96 with a 4.2 Its thin and narrow in the tail and rides smooth in the chop. |
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NOVAAN
Joined: 28 Sep 1994 Posts: 1551
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Posted: Sat Oct 31, 2020 12:37 pm Post subject: |
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Sorry guys I thought he asked for min. sail size. I guess most of that applies to the max sail also |
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isobars
Joined: 12 Dec 1999 Posts: 20935
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Posted: Sat Oct 31, 2020 2:09 pm Post subject: |
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Too much sail, just like a COE that's too high, will also sink the nose. But if one can control it -- i.e., has greater skill -- a high COE (plus a tight leech) can produce some big air and extended hang time. |
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dllee
Joined: 03 Jul 2009 Posts: 5329 Location: East Bay
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Posted: Sat Oct 31, 2020 2:35 pm Post subject: |
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Efficiency.
You can put a 7 meter sail on a 85 liter freeride board, but you're better off with a 6 and 110. |
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ss59
Joined: 10 Nov 2016 Posts: 104
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Posted: Sat Oct 31, 2020 3:29 pm Post subject: |
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Probably got this wrong but I always thought max sail size is determined by max fin size which in turn is determined by the one foot off-width |
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swchandler
Joined: 08 Nov 1993 Posts: 10588
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Posted: Sat Oct 31, 2020 3:56 pm Post subject: |
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ss59, I'm also of the opinion that sail and fin size must be properly matched to get the maximum performance possible. If the fin is too small, particularly with larger sails, the sail and its power are heavily compromised.
Now, considering the wavy nature of the boards highlighted, the likely smaller multi-fin arrangements on these boards is probably the limiting factor in recommended maximum sail size. You could theoretically use a larger sail, but the sail's potential is lost because it's out of balance with the fin(s). However, you could increase fin(s) size and the total fin area to achieve a better balance with the sail. The downside with larger sails and more fin area is getting the kind of maneuverability and handling you want in a wave environment. |
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dllee
Joined: 03 Jul 2009 Posts: 5329 Location: East Bay
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Posted: Sat Oct 31, 2020 7:09 pm Post subject: |
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Circa 1988, Doug Haut placed 2nd overall in a San Luis Res. speed trial using his 8'8" x 17" speed needle with a 7.0 borrowed sail in gusty 10-20 mph wind. His board was probably around 65-70 liters.
Fin was Rainbow Speed 7.75 that was a bit thicker than the US box. |
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U2U2U2
Joined: 06 Jul 2001 Posts: 5467 Location: Shipsterns Bluff, Tasmania. Colorado
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Posted: Sun Nov 01, 2020 9:49 am Post subject: |
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The people who write the advertisements, going from your chart, nothing much is consistent. Far too many variables to have a written in stone specification.
What one is comfortable on, a 7.5, another could be 6.5. _________________ K4 fins
4Boards....May the fours be with you
http://www.k4fins.com/fins.html
http://4boards.co.uk/ |
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techno900
Joined: 28 Mar 2001 Posts: 4161
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Posted: Sun Nov 01, 2020 10:54 am Post subject: |
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I have two similar boards, one 105L bump and jump and a 108L slalom. Both the same width. The 105L board is best with 5.2 to 6.4 sails (6.0 ideal). The 108L board is best with 6.6 to 8.4 sails (7.6 ideal).
It's the tail design/width and fin size that determines sail size in my experience. |
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