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49er sails

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Skiffman View Drop Down
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Post Options Post Options   Quote Skiffman Quote  Post ReplyReply Direct Link To This Post Topic: 49er sails
    Posted: 16 Apr 07 at 7:06pm

the sailmakers do not want to put a bigger roach on the main, but if the carbon mast means that lighter teams are quicker then they will counteract that by increasing the main. If a bigger main isnt needed then they may well use change the luff curve to match the carbon rig. If they change the mast then it will cost £4000 so you have one spare or £6000 if they change the main aswell so you have a racing and training main.

Also the new carbon mast will be in 3 sections making it cheaper to replace if not repairable and you can send one by a courier. May be bother most people but if it means that you can get a complete new mast the following day without having to drive up to newcastle and back then its definatly a positive.

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49erGBR735HSC View Drop Down
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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 9:32pm

If the plans were proposed today and I had to cast a vote for them, I'd support them. When I heard about it at first, I was quite but reckon that it will be quite positive for the class in the future. There has been talk of the main area being increased, but does anyone know if there will be an increase in kite size? I'm guessing since the Bethwaite site is quoting 50sqm at the present moment, that might be a hint at an increase.   

Dennis Watson 49er GBR735
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Post Options Post Options   Quote Guest Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 9:34pm
If they are worried about the weight of the sailors why not make the wings narrower?
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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 9:40pm

That would help shave a bit of weight of the boat, but the new wings would probably be on a par expense-wise to a new main-sail, and from a logistics sense, easier to distribute new mains rather than 2 wings.

Dennis Watson 49er GBR735
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Post Options Post Options   Quote Strawberry Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 9:53pm
Aren't the wings adjustable, as a relic from the weight equalisation days?
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 9:56pm
Didn't the original 49er in the trials have adjustable wings? Looking at the pictures, I'd have thought it would be possible to set the same wings further inboard? Not that I'm at all sure that it would be a good idea. A bit like forcing formula 1 cars to put treaded tyres on to make them slower...do they still have them this year? 
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Post Options Post Options   Quote Guest Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 10:18pm

Originally posted by Strawberry

Aren't the wings adjustable, as a relic from the weight equalisation days?

Yep ...

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combat wombat View Drop Down
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Post Options Post Options   Quote combat wombat Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 10:37pm
Surely carbon wings will cost more than a mainsail.

Why change a boat with such good fleets and competition just to fuel a few ego's?  Being the quickest isn't the be all and end all (although granted the 49er does get a lot of press for its reputation of being fast).  And to cater for the heavyweights, surely the suggestion of weight equalisation is best, or you end up with the RS300 type A rig/B rig scenario, where the A rig just isn't as quick. 

The new rig will have to be perfect in order to make sure that it powers the heavyweights along at the same speed as the old rig does the lightweights. 
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Skiffman View Drop Down
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Post Options Post Options   Quote Skiffman Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 07 at 11:48pm

there is only a 10kg difference in the crew weight at the top, they just do not want to move the weight down 10kg! Most of the crews are 148-150kg anyway under 145 and you struggle to keep up with the heavier guys in over 15 knots.

the other option beithewaite said was to just back the mast 20-30cm longer, but keep the kite at the same height. Either way the boat is going to become even more likely to pitchpole if the main gets any bigger.

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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 07 at 8:52pm

The question is why increase the mainsail to accomidate the heavyweights in the fleet. There are many pro-sailors in the fleet and although I'm not getting paid to sail my boat at this stage, I could easily drop 5-10kg to stay competitive, so surely the guys who are getting money for sailing could easily make the drop. The sailmakers aren't wanting to alter the sail design, and putting a square top on is going to negatively affect the upwind performance of the boat for arguably better offwind performance. I'm seeing a real good argument for carbon masts but have doubts about if the mainsail needs to be increased. Most of the weight in the current masts are low down in the bottom section so the centre of mass of the mast is low down already. Putting a carbon mast in its place will lower it slightly more but it isn't going to have that great an effect on the righting moment needed to keep the boat upright. Think what the B14 sailors were saying earlier about there experiences with the conversion makes sense, Carbon masts will help aid better performance but won't turn the whole fleet on its head.

Dennis Watson 49er GBR735
Helensburgh S.C
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