We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
@ Antonmik,
Severne, do the Hyperglide 2 in 8.0, 9.0 and 10.0
www.severnesails.com/sails/hyperglide-2/
Other brands may offer similar sails local to your area.
Select to expand quoteAUS169 said..
@ Antonmik,
Severne, do the Hyperglide 2 in 8.0, 9.0 and 10.0
www.severnesails.com/sails/hyperglide-2/
Other brands may offer similar sails local to your area.
As Aus169 says, many major brands have a foil specific large sail including Severne, NP, Gaastra, Loft, Challenger, Gun, Duotone, Phantom, Sailworks, etc. They are expensive for the non-racer and unless you are pushing the limits up and downwind in very light air, are of marginal value to the avg foiler. Hence, most rec foil lines stop around 7.5 or 8.0. The rec foil sails are oriented more towards power and ease of handling/pumping but give up stability from the reviews and comments I've read.
Prior discussion of cutdowns: www.seabreeze.com.au/forums/Windsurfing/Foiling/Has-anyone-done-a-DIY-cut-down- 
Edit: Added some brands that I left out because I hadn't had my coffee yet. 
Since this topic is about cambered sails for foiling, you can always go with older big slalom sails for foiling.
My 1999-vintage Sailworks XT Racing sails (6.4, 7.4, 8.5, 9.9) have a higher aspect ratio than the later NX series of race sails. 3 cams, bomber construction, a tad heavier than dedicated foil sails.
I can't tell the difference between my XT 6.4 and my 7.0 Sailworks Flyer on the water. Somebody with some real skill might be able to tell the difference.
Plenty of advanced foil racers are using windsurf race sails rather than foil dedicated.
Select to expand quoteLeeD said..
Plenty of advanced foil racers are using windsurf race sails rather than foil dedicated.
Good point. This is very true in 6 and smaller. A lot of the personal bests are being set on conventional sails. One can certainly use larger formula/slalom sails on a foil board. The drawback is the much longer boom length and any change in draft making trim on the foil more challenging.
Your point is absolutely correct, especially in a non-competition context. I've seen a 9.0 slalom sail do pretty well vs foil sails, too, in local competition under a talented rider.
Personally, I found very little benefit with a 9.5 over a 7.7 (both freerace slalom) because it was much easier to pump the 7.7. Once up, there isn't much difference for JRA (just riding around) between the two even at the low end. I feel like I can get the 7.7 off the water sooner so it's my go to on those "I just want to go out today even though I may only get a handful of rides" days.
The 2 Np sponsored sailors say less stable than F and slalom sails due to thinner, softer battens and less reinforcenents.
1 non sponsored sailor is undecided, liking his old Gaastra's a lot but they had seam problems.
Foil sails are supposed to be lighter in weight. You do the math.
Our Cal Cup fleet consists of around 17 competitors, only a handful with foil sails.
Of course, 1 and 2 are sponsored by NP.
Select to expand quoteantonmik said..
We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
Well done for having a go, please post an image of 11m when you have alterations finished, and like to hear how goes on water for you.
cheers tony
Select to expand quotetonyk said..antonmik said..
We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
Well done for having a go, please post an image of 11m when you have alterations finished, and like to hear how goes on water for you.
cheers tony
Both sails are cut. I didn't do that I'm about to buy foil sail or trim the old one. In the photo, two sails and they tried them on the water and they liked it.
And the idea to trim the sail nice look at exotec. high sails at 10 as much as 614 cm.
www.exocet-original.fr/gold-foil-c2x30618751
Select to expand quoteantonmik said..
We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
Hum ... I have two old Point-7 ACX 5.8 and 6.5 ... I might give them a try. What did you to for the batten stops? Just hand sew it?
Select to expand quoteduzzi said..antonmik said..
We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
Hum ... I have two old Point-7 ACX 5.8 and 6.5 ... I might give them a try. What did you to for the batten stops? Just hand sew it?
duzzi, I'd hesitate to do sails that small. You aren't gaining much if anything. This works much better on old 10-12.5 Formula sails where you go from a 250-270 boom to 220-230. A lot of really good foilers just use their slalom sails especially 6 and below if speed is the objective.
Redoing the batten stops is the expensive part, afaik, if you are paying a sailmaker as there is a fair amount of hand work (cutting/reassembly) that needs to be done. Given all the layers you have to go through sewing a batten pocket, I'd say a machine would be of great help. btw, the Florida guys just cut out in the entire clew and resew it in to save the cost of rebuilding a clew and installing grommets. The cost of doing your two Point-7s properly at a sailmaker would get you most of the way to a Flyer 6.0.
Select to expand quotePaducah said..duzzi said..antonmik said..
We cut off the old big sails for the Foyle and it turned out very well. Has anyone tried trimming a sail?
or look for a sail like the Severn glide. For example, for a light wind of 5-7 knots, I need a sail of 9.4-9.6, and the server does only 9.0. I'm afraid it will not be enough for a light wind.
Hum ... I have two old Point-7 ACX 5.8 and 6.5 ... I might give them a try. What did you to for the batten stops? Just hand sew it?
duzzi, I'd hesitate to do sails that small. You aren't gaining much if anything. This works much better on old 10-12.5 Formula sails where you go from a 250-270 boom to 220-230. A lot of really good foilers just use their slalom sails especially 6 and below if speed is the objective.
Redoing the batten stops is the expensive part, afaik, if you are paying a sailmaker as there is a fair amount of hand work (cutting/reassembly) that needs to be done. Given all the layers you have to go through sewing a batten pocket, I'd say a machine would be of great help. btw, the Florida guys just cut out in the entire clew and resew it in to save the cost of rebuilding a clew and installing grommets. The cost of doing your two Point-7s properly at a sailmaker would get you most of the way to a Flyer 6.0.
You are probably right, just a thought mostly because I have four ACX (5.4-5.8-6.5-6.5 ... long story)! They are actually working pretty well on my Flikka.
Select to expand quoteduzzi said..
You are probably right, just a thought mostly because I have four ACX (5.4-5.8-6.5-6.5 ... long story)! They are actually working pretty well on my Flikka.
No worries. Most of us have our own version of that same story. Hardest part is the stare you get from the SO when you explain the sequence of events leading up to the situation.
Select to expand quotePaducah said..duzzi said..
You are probably right, just a thought mostly because I have four ACX (5.4-5.8-6.5-6.5 ... long story)! They are actually working pretty well on my Flikka.
No worries. Most of us have our own version of that same story. Hardest part is the stare you get from the SO when you explain the sequence of events leading up to the situation.
Nice thing of this accumulation story is that Point-7 sent me two free sails as warranty. The ones I bought came without mini battens and were quite "flappy" and noisy when overpowered! I sort of fixed them with some tape and very thin carbon rod but could be good candidates for further mods ... A guy around here did an elaborate Ezzy Hydra style mod, but I don't think it worked that great.
PS After all these years the lovely SO and I still have separate accounts!
I'm doing the opposite, my Overdrive is a really good foil sail with high aspect and short boom. I'm going to add some extra sail to square off the bottom just like the foil glyde. Lucky for me I have a spare 7.8 if it doesn't work ?? I can buy an industrial sewing machine for 1/4 the price of a new sail so why not
Tinlyds, I'm confused on a couple of points:
- what are you doing above the batten above the boom?
- are you extending the battens below the boom?
Looks like a fun project!
Select to expand quotePaducah said..
Tinlyds, I'm confused on a couple of points:
- what are you doing above the batten above the boom?
- are you extending the battens below the boom?
Looks like a fun project!
I don't know I never think too far ahead 
