[MHml] Slack suckers.

Paul Nudd paulnudd at actionpotential.com.au
Tue Oct 17 10:47:00 EST 2006


The Farrier tris use a multi part tackle (manually adjusted). They 
terminate the shroud a few feet above the chainplate with a toggle and 
have a short shroud extension to cover the distance to the chainplate. 
This eliminates Roy's 'kink' in the shroud which I have seen cause 
shroud failure and loss of rig. The tackle attaches to the toggle and 
runs back in the case of the farriers but forward would be just as good.
I have been meaning to do this for my shrouds but it is not urgent as my 
mast does not rotate so I don't have a lot of slack, compared to a 
rotater. I do have a lot of slack compared to a monohull.
When I do it I will use a similar system to Roy's but with the Farrier 
style toggle to prevent 'kinking'.
PN

Roy Mills wrote:
> Gougeon said that they used a length of line from each stay forward 
> to a 4 part tackle at each bow with bungee running in the blocks. 
> They also said that There were lots of different ways of doing it and 
> various opinions as to the best way. So FWIW here is what works for me.
> 
> 	THinking things through for myself it seemed to me that the 
> slackness in the leeward shroud was magnified because the slackness 
> in the windward shroud had all been taken up by the mast leaning to 
> leeward until the windward shroud was tight and  Straight. So I 
> thought if the tightening of the windward shroud could be used to 
> take up that leeward slack all would be well.  So I have a length of 
> 1/4 inch nylon starter cord running from about 8 feet up one stay, 
> forward to a small block at the bow, across to a similar block on the 
> other bow then back to the other stay about 8 feet up. It is snugged 
> up tight at rest and so puts a forward "kink" in the stay at the 
> attachment point of the starter cord. It's not really a kink as such 
> but I didn't know how else to describe it. So when the windward stay 
> tightens into a straight line it pulls back on the starter cord which 
> in turn pulls the leeward stay further forward and takes out much of 
> the slack. To get the rest of it out a length of Bungee pulling on a 
> small block on the centre of the cord span between the hulls works 
> very well, the mechanical advantage of a "swig" on a line is very 
> high. This bit of bungee is dead ended at the centre of the front 
> cross beam. So this set up works well on my cat but may not suit a 
> tri. My stays have considerable slackness at rest so that the 20 inch 
> wide wing mast can be turned 90 degrees either way, and when it is 
> trimmed that far around there is no slack in the leeward stay as it 
> is all taken in wrapping around the curve of the mast. People with 
> smaller mast sections will not need that much slack.
> 
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