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59er Sails - very flat
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49erGBR735HSC View Drop Down
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Posts: 1991 		Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Topic: 59er Sails - very flat
    Posted: 25 May 07 at 1:13pm

This might sound a real silly question but is there any possibility that the 59er sail has been mixed up with a 29er sail at some point, even before the sails got their class insignia stamped on them? I don't know what the measurements are from off the top of my head but the difference between sail size might be because of this reason. might be worth measuring the old 59er sail against a 29er one if you get the chance.
Dennis Watson 49er GBR735
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damp_freddie View Drop Down
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Posts: 339 		Post Options Post Options   Quote damp_freddie Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 07 at 12:53pm

Bad day at neil prydes then...maybe a 'friday afternoon' sail.

 

try laying two sigma 33 mainsails over each other

He may be banging on too much rig or halyard tension

 

good luck with the new sail
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Posts: 1502 		Post Options Post Options   Quote redback Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 07 at 11:59pm

No Ian99, mylar and as see through as any sail I've ever seen, but also rather new looking and certsinly not thrashed.

Testing temporarily halted as the mast track has fallen off the mast!
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Posts: 138 		Post Options Post Options   Quote Ian99 Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 07 at 9:57pm
If the other jib was quite old and had been flogged a lot, it would be quite a different shape to the new one anyway because it had been used. The laminate cloth can shrink as it gets older. Dependent on how the cloth has been laid out, the sail could  either end up flatter or just a really horrid shape if the shrinkage is in different directions in each panel!

This is where I look really silly when someone tells me a 59er has a dacron jib ...
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Posts: 669 		Post Options Post Options   Quote ifoxwell Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 07 at 1:37pm

As an update to this story.

The owner in question has now bought himself a new jib and the difference in shape is quite marked. Its still a flat'ish cut but at least it does have some shape.

A demonstration of the fact that strict one design does not mean that everyone has the same equipment!!

Ian
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damp_freddie View Drop Down
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Posts: 339 		Post Options Post Options   Quote damp_freddie Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 07 at 12:48pm

Originally posted by redback

Thanks guys I'll pass it on.  Yes I thought big flat sails instead of small full ones but actually the sails aren't that big.

 

no, but the boat is very light ( vs say RS400) and easily driven.

Also off wind it means the main is not overpowering you and is nice and light on sheet load.

Anyone who sails an RS400 should jump in a 59er for a test drive and be amazed at the light touch it takes to go faster! 

reasonable vid', pity about the voice over-

http://www.russellsmith.f2s.com/Zoom.rm



Edited by damp_freddie
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redback View Drop Down
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Posts: 1502 		Post Options Post Options   Quote redback Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 07 at 7:35pm
Thanks guys I'll pass it on.  Yes I thought big flat sails instead of small full ones but actually the sails aren't that big.
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damp_freddie View Drop Down
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Posts: 339 		Post Options Post Options   Quote damp_freddie Quote  Post ReplyReply Direct Link To This Post Posted: 19 Apr 07 at 10:59am

The flat sails also produce less drag - which is all part of the philosophy of the boat- the hull has a bit more rocker/deadrise and relatively long chines on a relatively narrower immersed hull making it slippier than the 29er/49er.

I reckon swiftsolo risks a bit with his upper D2s being slack-alice - but I presume the windward one comes tight when sailing(?)

 

I think "design wind" for the boat must be about 9 knts (with lard at 150-180kg !)  and there after you are depowering the already flat sails! Low and fast is the aim- don't try to point.

If you can invest in a dinghy-speedo,  or have a GPS, you should be able to do 7/8ths of windspeed upwind in up to 12 knts breeze, and almost up to 1/3rd faster than the wind on the "run".

Swifty can tell you more about higher winds, but I just remember bombing down over the wave train wearing a grin and being able to chill out!
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 07 at 8:23pm
Originally posted by redback

We have a 59er in our club (Wilsonian).  We have tried loads of luff tension.  .


Why??  Thats not going to add any depth to the sail, if anything I would have thought it would make it flatter.  Which hole on the jib clew plate is the sheet attached to?  Have you tried moving it up to the top so that there isn't so much pull across ways?  When i sailed that boat, the jib seemed absolutely fine (in fact it set beautifully) so unless something's been changed since then there isnt actualy anything wrong with it. 
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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 07 at 8:14pm
There's a principle being established that larger flat sails are easier to handle than smaller full ones for the same power. Hnece the 59er has relatively large sails for the righting moment etc available, but they flatter.
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