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Bottom end for 8m cam sail

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Created by sonny2727 > 9 months ago, 21 Feb 2015
sonny2727
VIC, 153 posts
21 Feb 2015 9:43AM
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Hi all,
I have 8m 3cam sail ( HSM GPS) . I'm trying to find the planing bottom end for this sail. If course it depends on lot factors so here's my quiver . Fanatic falcon 69cm wide vol 107 L, select slam 41cm fin , carbon boom and mast. Weigh 70 kg. conditions are bay chop when it's around 15kts. I wonder whether anyone sail comfortably around 13kts with this size sail

mkseven
QLD, 2309 posts
21 Feb 2015 11:45AM
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At your weight yes you should be able to.

hardie
WA, 4077 posts
21 Feb 2015 3:48PM
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Select to expand quote
sonny2727 said..
Hi all,
I have 8m 3cam sail ( HSM GPS) . I'm trying to find the planing bottom end for this sail. If course it depends on lot factors so here's my quiver . Fanatic falcon 69cm wide vol 107 L, select slam 41cm fin , carbon boom and mast. Weigh 70 kg. conditions are bay chop when it's around 15kts. I wonder whether anyone sail comfortably around 13kts with this size sail


8.3m is a big sail, i'm 93kg, and unless I have the sail totally balanced and rigged right its a handful. 13kts with what your talking about should be planing no problem at all. With a wider board and bigger fin, you could plane at 10 kts. With my 8.3m, 78cm wide board (i30Litres), and 42cm weed fin, I can plane in 11kts, and once going I can plane through 9 kt lulls. But If I haven't rigged it right, got harness lines in right position, and mastfoot placement right, then once it gets over 14 kts, its a sail that you start fighting with and need brute force to manoeuvre it, I'm 93kg and usually carry 5 litres of water (5kg) of weight. You pay a big price for the extra lift. I deally at your weight the biggest sail on that board would be around 7.5m, but life's never ideal!!

RumChaser
TAS, 619 posts
21 Feb 2015 7:00PM
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Let's face it. Actual wind speed on the water is always going to be guesswork. At what I think would be about 12 knots I can get planing on a 115 l board and a 7m sail at 75 kilos. I would of thought 13 knots would be pretty easy planing conditions.

sonny2727
VIC, 153 posts
21 Feb 2015 9:18PM
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Thanks for all the replies. I know it's big sail for my weight. Actually it's 8m sail with 3 cams. I think ideal for the board is 7.5m . This boards actual volume 107L but fanatic branded it as 113. I'm still playing with sail and board setting so hopefully it would be easier

Waiting4wind
NSW, 1871 posts
21 Feb 2015 11:43PM
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I have this sail and it has a great bottom end. With a 74 cm slalom board and fat fin I can pump it into the plane in 12 knots, I'm 90kg light. that size would be a great match for your Falcon.

With a bit of technique it should be a great light wind set up for your weight. Are you using the recommended mast?

checkout the pic in this post in the nsw section. I'm using the gps 8m, it was a light day 10-15knots.


www.seabreeze.com.au/forums/Windsurfing/New-South-Wales/GPS-Freerace-3-Weekend-of-14th15th-Feb/

flatout
84 posts
21 Feb 2015 10:15PM
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I used to have sail an 8m2 2cam NP V8, which was my go-to-sail. For me the comfortable windrange was 14-20knots at 85kg. So 10-12 knots as bottom end seems right at 70kg.
Under that i really had to pump the sail and over it became quite a handfull. I now use a no cam 7m2 for 14-18knots, which is equally as powerfull as the 8m2, but a lot easier to pump. I find I like cam sails better when using them in their top-end range. The best sessions I had with the 8m2 was at 18-20 knots.

petermac33
WA, 6415 posts
21 Feb 2015 11:48PM
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If you have a deep Tuttle box try a huge fin with a thick foil.

Was going to try a 46 Lockwood fin today in my Sonic 107 which is 70.5 cm wide but I lost my screwdriver.


Will try next day it's light and let you know.


You should get going in 13 knots at 70kg but a 80 cm wide board will power you up more.

AJEaster
NSW, 695 posts
22 Feb 2015 3:43PM
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I have a Falcon 113 and love it. I used to run the 8m 2012 HSM on it and it worked a treat with 40cm Meanline slalom fin. I am 92kg and found at 15kn everything started to boogie for me, so given you are far lighter, your desire of 12-13kn planing will be easily achievable.

My favourite sail for the 113 Falcon for balance, ease and pure enjoyment is a 7.1m (KA Race), with a 36 or 38 fin depending on water state

sonny2727
VIC, 153 posts
22 Feb 2015 6:43PM
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I do rig this sail on the recommended mast . and the fin looked OK on Select fin selector chart but I could try bigger one. It looks like I have to work on the technique more and possibly put on a weight belt for higher winds.

mkseven
QLD, 2309 posts
23 Feb 2015 8:29AM
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It's all in technique & effort.

41cm fin should be fine, I run that size select in my 107 isonic with 8.6.

Your falcon is designed to work with a bigger heavier sail than the one you are using though being used in a fair bit more wind. 7.8 tends to be the sweet spot for that size board.

Setup wise you can move the mast foot back a little (if it gets skatey or spinout or cant hold fin down you've gone too far), you need to get the shape out of the water on these short rocker boards, once powered move mastfoot back to ideal. Make sure you have enough downhaul, sail needs to drive forward not drag & bog board down- if sail is pulling but you're not going you dont have enough downhaul.

We used to have a slalom 88 class here- max 8m sail, 80cm board. Most of the sub 78kg guys would be on 69 wides & 7.8's planing in 12 knots at start boat.

Dont be concerned too much about volume, it just gives you that warm fuzzy feeling when you are not planing or uphauling or surrounded by bruce n friends, 107 is easy enough to support that sail.

Haggar
QLD, 1664 posts
23 Feb 2015 10:03AM
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I have a Futura 111 which is the same width as yours and use a 7.8 Loft Switchblade for light winds. Id say i plane in around 12 knots but tuning and technique is key. As Mark said use the right downhaul then i find neutral outhaul is best for me. Boom height about 3 cm higher then normal. If you use a bigger fin you will probably plane a little earlier but may slow you down once planing. If you can't pump onto the plane then this is an area you can learn and exploit to plane early as you find once on the plane you need less wind to keep planing. You will see sailors plane in very light winds they have all this nailed!

sonny2727
VIC, 153 posts
25 Feb 2015 10:15AM
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Thanks for all the tips. Got it going 13-15 knots yesterday . More downhault and mast foot back helped. Next time when it's 12 kts I will test if this setting works. For once waiting for the wind to go down :)



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"Bottom end for 8m cam sail" started by sonny2727