do drawings as we speak but will post tommorrow

That pocket was a big oversized one with lots of sail and cam parts inside , so it will have to be done once unpicked

This one looks like it's got a fair bit of seam shaping, would you recommend flattening it out a bit Landyacht?

nebbian said...

This one looks like it's got a fair bit of seam shaping, would you recommend flattening it out a bit Landyacht?

Posted 06/09/2009, 5:43 pm
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GIZMO SAYS ""

Yes, a standard sailboard sail has normally got quite a lot of "draft", "belly", "shape" all the different names used for the same thing, this will give you a lot of power but not huge amounts of speed where as a flatter sail will give you speed but not huge amounts of power.
Think about a tractor with lots of power but not much speed where as a F1 race car has speed but couldn't tow a load.
Often a fuller sail works to your advantage on a landyacht, if you sail on grass areas or soft sand you need more power to get you up and going, where as a hard surface like a salt lake, hard beach or sealed carpark you would be wanting a flatter sail to obtain the maxium speed posible.
Often yacht design and sail shape are dependant on your local sailing area.


Nebbian i think your right but the places i will be sailing to start with will be 90% grass so i'm thinking if there is a bit of "belly" in it that might be ok to get started,i have another sail that will look good on my yaght it is a tushingham 5.2 with good amount of top, when i learn a bit more about recutting and sewing sails i will attack this one here it is

A little confused i made a life size template as per instructions in the sail cut post but i am not sure how to use it correctly, suppose i cut the foot off 30 mm below where the pocket ends (as per pauls recomendation) do i use the foot of the template there and match up the top of the template to the top of my sail,i made the template to the full 4.5 metres and my sail will be about a metre short of that will that still give me the correct cut line for the luff ?

Ok i'm sure i know whats going on there
Questions !
1: Should i cut the foot at 72` (L/B angle)?
2: Should i lower the foot cut at the luff so that the cut at the clew is below the bottom batten ?

Ok here goes the cut,laid sail out flat and refered to pauls drawing located the foot cut and drew the line where it was on the drawing this pic you can just see the line


Looked ok so went ahead and cut



Now for the luff. Laid template over sail so the bottom of the template matched the base cut then lined it up to where i stoped unpicking the mast sleave then drew the line along it looked ok so then cut it.


Only a small strip was removed from the luff edge.



So far happy with progress just have to figger out now the rest

Landyaght ,Hi the mast pocket is cut and sewin at the leading edge at the top 1/4 of the sail to give it a bit of curve do i need to remove that curve and have the mast pocket
straight, and also are we going to get rid of the batton locks ?

I am starting to see what you mean about the fiddly bits when it comes to sails with batton cams the mast pocket in this one is a bit of a problem let me explain.

1/ The leading edge of the pocket tappers in at the top and bottom (refer top photo)and is sewin down the leading edge.

2/ To make a straight pocket i will have to cut off the leading edge and sew down the middle of the pocket instead of removing material from the edge.

3/ 4 zippers have to be removed where the cam locks used to be,other wise they will sit right on the front of the mast and end up wearing out the mast.

4/ to remove the pocket at the top of the sail will require the removal of the stainless eyelet,problem being i can't find where to get a 3/4 inch id eyelet tool ,the crappy cheap brass tarp eyelet tools are a joke.

5/ There is mono film sewin ino the pocket where the cam locks were to reduce where and will have to be removed.

So there is quite some work to do just on the mast pocket,Landyaght have you ever had a seam down the leading edge of a pocket and does anyone know where to get a desent eyelet tool?

landyacht said...

happens all the time.
turn the pocket inside out, and stitch it up in 2 rows of straight stitch, rather than cutting the pocket, If your not happy with how it sits on the sail you can redo it. usually I just leave the zips in
now you know why i dont recommend cammed sails for recutting

Sounds like a good plan to me LY thats what i will do ,is there an easy way of removing the eyelet and do you know a source for good eyelet tools

Thanks iand ,as i have little clue as to what i'm doing with sails thats an option worth looking at i still can't find a eyelet tool,saw another option and that was to sew on some tape with a D ring

HI guys been flat out and havn't had time to do whats needed

to be done, my yaght is almost finished and need to get cracking

on the sail ,anyway (this the is cool bit) when i cut the foot as

per Pauls drawing "have a look at where I put the dotted line on

the drawing, I drew as many ogf the panels on as i could "

I was thinking about his post on sail making

tp://www.seabreeze.com.au/forums/Land-Yacht-Sailing/Sail-making/How-I-recut-sailboard-sails-to-suit-landyachts/

and about the angle of cut on the sail see next pic


Well all i can say to that is wow you have an excellent eye, i pulled out the

sail to get it ready for some sewing and thought i would measure the angle

of th L/b cut and this is what i found



With his drawing and my interpritation of it the cut was 73 degrees thats amazing

The piece that was cut off couldn't be directly sewn on it didn't fit so i had to
delaminate the pieces and recut them to suit the the original sail look.

This the part cut from the bottom of the sail



And the delamination process



There was 10 layers that needed to be unpicked to seperate all the pieces



Once it was all seperated i then arranged the pieces to fit the gap in the clew
also to reinforce the downhaul part of the sail,the mast pocket no pics sorry
was cut and with 3 strips left over was able to fill original boom hole i used
new strapping at base and top of sail as the old stuff was as stiff as as a board
the sewing machine that we(my mum) used was circa 1960's and it did a fair
job on the thin sections it realy struggled on the thick stuff 10 layers of sail and
2 layers of strapping we(mum) had to force the work under the foot of the machine.Any way this is how it turned out.


A couple of corner shots




And flip side







I think it looks ok just need to do a fitting that i will do tomorow see you soon.

that is lookin so good. I think you will find on future sails that you dont need all 10 layers as we are not straining the sail as much as the windsurfers do. buy your mum a nice bottle of wine as a thanx , or dinner, , and flowers of course