Welcome to the UKWA Home Page Forums Technical Efficient Use of Jib as Alternative to Genoa Luff Spar Re: Re: Efficient Use of Jib as Alternative to Genoa Luff Spar

#10804
Swiebertje
Participant

I have made some quick sketches to explain the extra sheet fairleads on the breakwater.

Let us assume that the mean position of a fairlead is somewhere on the extended line that runs from the clew to the luff and meets the luff at a square angle.
[attachment=2:2zlosoob]Genoa.jpg[/attachment:2zlosoob]When a Genoa is furled (the white area), the fairlead position doesn’t change. In real life we do move the fairlead but that is because we want to adjust our sail shape, it is not caused by furling the Genoa.

Here is the same sketch but it now depicts a Genoa (Grey) and a Jib (white).
[attachment=0:2zlosoob]Jib.jpg[/attachment:2zlosoob]When we apply the same rule (the fairlead is on the extended line from the clew to where it meets the luff at a square angle) it is clear to see that the line meets the deck much further forward compared to the Genoa sheet. This is why you need an extra set of fairleads for a jib or a storm jib (dotted).

If you use one of those storm jibs that is cut high above deck (to drain water quickly and to avoid it being led to the cockpit) the clew may be on the same line as the Genoa’s. If that is the case you don’t need the extra fairleads on the breakwater for your storm jib, you may just as well use the Genoa fairleads.
[attachment=1:2zlosoob]StormJib.jpg[/attachment:2zlosoob]
It is all about geometry.

Instead of extra fairleads a barberhauler can be used or one can be jury rigged with some rope with a bowline around the sheet. Maybe you should have a look at how some of us use a barberhauler on the Spinnaker sheets. I see no reason why a similar solution shouldn’t be used on Genoa/Jib sheets.
On the other hand, having separate fairleads allows the use of a separate jib sheet avoiding the need to move it from one sail to another.

hope this helps.