Sail luff curve for typical landyacht sail on Windsurfing mast ?

5 years ago
Reply
Register to post, see what you've read, and subscribe to topics.
jmf1
jmf1
70 posts
70 posts
7 Aug 2021 3:51pm
Hello,

My intention is to recut old windsurf sails to fit a windsurf carbon mast on my Plumekart. The key part will be to have a correct luff curve.

I can't start from my windsurf sails luff curve as they work with tremendous downhaul, which is not the standard (and my Plumekart) setup <= main sheet doing also the downhaul.

I have found the plans of sails and associated luff curve for LLM mast. But this is a totally different beast (different bend curve and stiffness). I wouild be happy to build a LLM mast, but it is quite difficult and expensive (compared to used windsurf masts) to find the adequate alloy type.

Would someone have, and be willing to share, luff curves matching windsurf masts for land yacht sails setup ?

I'm looking for about 4.5m2, 3m2 (and maybe 2m2).

JMF
kennatt
kennatt
135 posts
135 posts
8 Aug 2021 3:11am
there are many who have used uncut W S , I have used several over the years ,If used on the correct mast,and downhauled properly they are perfectly usable without all the bother of cutting and restitching,
Because they need to be downhauled first,the bend is already present and therefore a lot less effort on the hands you are only sheeting the rig in without the strain of also dowhauling at the same time. There are gains and losses (MY opinion only) The gains,...........
Modern WS sails are by far more stable,they are a solid foil. therefore you can use a larger sail in any given wind so more sailing time.They tend to point higher and on a beam reach are a bit faster(See solid foil,stable and larger) Lots available second hand. The losses.....
Bit of a faff on rigging and downhauling.tend to have a higher end boom(can be solved by adding a section on the clew)
They are certinly a bit slower as you come off a beam reach onto broad or run
Each to thier own of course,I'll still b using my 7.5m on light wind days but feellike sticking to the class five rules for a change.Gives others a chance to keep up with me
jmf1
jmf1
70 posts
70 posts
8 Aug 2021 4:32am
I note all the pros of the WS sails. I must say, that I also like the LY way, wityh sails that can quicly move from super full (lot of power) to a flat speedy sail. So I think that I will cut and stich. Since a long time I want to try do a sail. This is the opportunity to tinker and understand by making. Surfaces are small, cost is limited. Lot to learn and not so much money to loose, especially if working on old WS sails.

Go !
jmf1
jmf1
70 posts
Please Register, or first...
Topics Subscribe Reply