Originally Posted by Jim Cate
What keeps one from poling out the UPS type sail just as you do a genoa
when sailing very deep? I used to do that with an early gennaker-type sail and it worked fine.
Nothing at all - that is essentially what we do (without the pole). Since we are a catamaran
, we have the option of moving the tack over to the windward hull
, which, doing so, acts the same as using a pole on a mono rig since the clew sheet point is now 21' away from the tack. We have permanently rigged a wire bridle
with control lines between the hulls and the furler
drum rides on a block on this bridle
and can be easily moved from one hull
to the other.
Downwind with the halyard
slacked a bit to loosen the luff, the UPS acts like an asymmetrical, though not as efficient (or large). With a pole, it would be even better for a mono rig. The inefficiency deep downwind is due to the relatively straight luff and the leach twisting off at the top.
It is not as efficient as a full spinnaker
deep down wind
, but it does work to keep one moving in light air and is much easier in general to setup and use. Coupled with its ability to be used up to a close reach, it is a versatile sail. It is absolutely in its element in light winds at 70-120* AWA.