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Forums > Windsurfing General

how dose sail size relate to fin length

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Created by ains > 9 months ago, 2 Dec 2015
ains
NSW, 60 posts
2 Dec 2015 9:24AM
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today im picking up a new second hand sail, 6.8 north warp, I have a 30cm weed fin and another fin with suggested sail range on the side. is there a table you can copy laminate for your gear bag.

ains
NSW, 60 posts
2 Dec 2015 9:26AM
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Select to expand quote
ains said..
today im picking up a new second hand sail, 6.8 north warp, I have a 30cm weed fin and another fin with suggested sail range on the side. is there a table you can copy laminate for your gear bag.


opps spelling mistake "does"

joe windsurf
1481 posts
2 Dec 2015 6:46AM
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many factors to take into account
board width, volume, weight of sailor, etc

example: for my 8.x sails I use a 48 cm fin on my freeride and 56 cm on my JP SLW freeformula

here is a table from Select fins and there are others

66WSF
QLD, 413 posts
2 Dec 2015 9:17AM
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For free ride I always go sail size times 5 plus 2.

e.g

5.0m sail = 5x5 = 25 + 2 = 27cm fin

6.0m sail = 6x5 = 30 + 2 = 32cm fin


Got this tip on a clinic once and works for me every time, I go +/- 1 either way to suit my existing fins.

For slalom I usually go sail size x 5 plus 3.

Not sure about weed fins though.

ains
NSW, 60 posts
2 Dec 2015 1:48PM
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ok seems to make sense all my fins are 30cm
don't quiet make sense of the graph, may be having a blond moment.

I have a 6.2, 6.5 and 5.4ish sails

NotWal
QLD, 7428 posts
2 Dec 2015 2:14PM
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Select to expand quote
ains said..
ains said..
today im picking up a new second hand sail, 6.8 north warp, I have a 30cm weed fin and another fin with suggested sail range on the side. is there a table you can copy laminate for your gear bag.


opps spelling mistake "does"


MrSpinout
NSW, 106 posts
3 Dec 2015 4:34PM
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Check out the riggeek website. They have formulas that take your weight into account.

da vecta
QLD, 2514 posts
3 Dec 2015 4:04PM
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That's advice coming from Mr Spinout though

NordRoi
656 posts
3 Dec 2015 7:54PM
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According to Maui Fin Company, a lot with width of the board. According to them, we are choosing too small fins lately for our boards width. My friend chatted with them while they were testing fins for Naish boards. Funny however, when i try stock fins, I feel most of the time that I'm over finned!! ;-). They were saying, fins are now so well understood that it's will not spin-out. If you spine-out for no reason, you are under fin.

BSN101
WA, 2331 posts
4 Dec 2015 1:04PM
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Tribal Windsurfing.com has a chart which is good to compare. And probably accurate if using their fins

As a guide only as fins will work differently to another style/brand. Wave slalom weed speed

JP has a chart too

joe windsurf
1481 posts
6 Dec 2015 12:27AM
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@ains :
based on your question ...

i made myself a chart of wind strength with sail size mapped against board with fin:
so, in 20 kph winds (~11 knots) i will use JP SLW92 with 10 m² sail and 66 cm Select slalom or 58 cm True Ames SB weed fin
and i put litres/width as a board indicator as well

you can also see that sails in 8.0-8.5 m² range can have fins from 30 cm to 58 depending on the board !!

evlPanda
NSW, 9204 posts
7 Dec 2015 2:27PM
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Select to expand quote
ains said..
ok seems to make sense all my fins are 30cm
don't quiet make sense of the graph, may be having a blond moment.

I have a 6.2, 6.5 and 5.4ish sails


Find your sail sizes across the top, then go down the graph till you get to the width of your board.



For example your 6.2

If your board is 60cm wide then you'll want a fin between 30 and 34cm. 32cm is in red because i don't know that is a size Select make.

This board will have a sail size range of 5.5 - 7.5



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"how dose sail size relate to fin length" started by ains