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Post by paultp on Mar 10, 2010 11:48:31 GMT
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Post by Meat Pie ... on Mar 10, 2010 12:32:40 GMT
Paul
Go for any plain Bolt[i.e ideally not threaded all the way up its length]and fit a Wing Nut to be able to "lock" it down.Alternatively you could use a Nyloc Nut on the end of the Bolt and pin the Rudder Blade in the fully dow position.
The CEE-Vee Assembly looks all very lovely but RWO do a similar Assembly in plastic that is available ..Try Sailboats Northampton if our friends at P&B don,t have one.
As for Bolt length get a longer one to make sure you have got it right and then cut it off !
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Post by paultp on Mar 10, 2010 13:19:02 GMT
I wondered if there was something specific that people had used before. Anyway, I think I'm sorted. www.stagonset.co.uk/ |
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Post by casablanca on Jul 20, 2010 16:25:10 GMT
Just wanting some advice really. My rudder stock has 2 bolt holes, the original one is nearer the tramsom & quite worn, if I use this one the rudder does not go quite vertical & last Sunday when it was very windy I suffered with quite a strong weather helm. If I use the other bolt hole the rudder goes past the vertical ie. it points slightly forward but the boat is much lighter to stear.
Which bolt hole should I use? & is having my rudder pointing slightly forward likely to cause any problems eg slow me down?
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Post by colin on Jul 20, 2010 16:54:15 GMT
Elaine,
The general rule of thumb is that you can rake any vertical foil up to 10degrees forward or backward without much loss in performance. Beyond that tip losses start to kick in.
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Post by colin on Jul 20, 2010 17:19:02 GMT
Elaine,
It has occurred to me that I have answered your question but not the underlying error.
Raking the rudder backwards increases the ‘feel’, this is not weather helm, just a simple matter of mechanical leverage. Strictly, in the matter of weather helm, moving the rudder aft is the same as moving the centreboard backwards – it reduces it. If the centre of effort of the sail is directly above the centre of resistance, the helm is neutral. The centre of resistance is a combination of centreboard, hull and rudder. If for instance you increased the area of the rudder, you would move the centre of resistance aft and therefore reduce weather helm.
You can play any old tune you like once you understand how it works.
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Post by casablanca on Jul 20, 2010 20:14:35 GMT
Thanks Colin, at least I can put the rudder back how it was & know it won't slow me down.
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Post by paultp on Aug 2, 2010 8:37:54 GMT
I wondered if there was something specific that people had used before. Anyway, I think I'm sorted. www.stagonset.co.uk/These people seemed to have either stopped trading or are in the process of being bought out, either way their web site doesn't have a shopping cart system anymore. I bought a 5mm bolt, wing nut and washers from them and after fitting it (in the wrong place) realised that the wing nut wasn't big enough. Wing nuts sold by chandlers are 6mm and so I've just bought some bolts and washers from Taylor fasteners - www.taylorfasteners.co.uk/store/index.phpMinimum quantity was 10 (and 50 penny washers!) so if anyone needs a 6 mm bolt (60mm length) with only 1/3 of the bolt threaded I now have nine spare. £1 each plus postage (includes 2 penny washers and a spring washer) ;D Bolt fits a Goffo stock and I have now fitted it in the correct place and obtained a decent wing nut. |
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