Re: Furling Gear for Asymmetrical Spinakers / Gennakers
There is a new NZ brand beaumarine.co.nz, that seem very competitive. However they are a bit conservative on the sail area handled although the working loads capacity is a bit higher than other brands.
The attachment point is an issue. You can use the atn top tacker or beads to attach to the rolled up jib/ forestay but that limits the ability to let the sail forward to pick up the wind on a broad reach without sag to leeward. The alternatives are a small prod, which you want retractable to save having a spear sticking out of the bow, or if there is sufficient space ahead of the forestay eg on the anchor roller framework and it is strong enough, and it clears preferably your pulpit and lights. Both can involve a fair amount of cost in fabrication and modification to get the strength depending somewhat on the boat and the anchor pulpit set up.
The other thing is the wind angles you want to sail. The code zero will go to forty degrees true but rather less apparent so you get greater windward speed in the light but on my calculations the AWA may be around 70 so the VMG may not be as great as one thinks. The windload is also greater by around 50% roughly so the windrange is limited to probably below 10 knots, and you may need a bigger furler.
Where the assy does seem attractive is in the roughly 100-155 range. So you still tack downwind, and can hold it to about 15 knots allowing a bit for gusts.
Assuming normal cruising with a limited sail wardrobe rather than specialist sails for shorthanded racing. my conclusion was the hassles and costs of 1 the sail, 2 a larger size furler 3 special fabrications, outweighed the limited benefits and I was better off using the pole and existing sym spinnaker with a decent sock. I also needed to add or repair a good tiller pilot which is a separate issue really. I guess it depends on the boat your budget and how much you will use it.
Last edited by chris_gee; 03-10-2012 at 05:38 PM.
Reason: correct brand