It makes me smile every time I deploy the sails downwind. It gives me about 50% more speed than just using one Jenoa in light winds. They work very well, and can accommodate wind up to 30 deg off the stern with the pole on the windward sail. I can furl the two sails from the cockpit, no need to go forward. I have a spinnaker pole which is the right length to attach to the mast fitting and the windward clew which I do with the sails furled (very safe way of doing business). I found another similar age/wear Jenoa going very cheap, which I sewed to my original (I don't have dual bolt rope grooves in my furler). We could have saved a few lines without securing the pole ends this way, but it made the setup and take down very controlled - not a bad thing on a foredeck offshore. The sheet just slid though the pole fitting. We also had a uphaul and downhaul for each pole's outer end. An uphaul, two downhauls attached at the deck so you could turning the sail for a broad reach. We had a whole bunch of lines to hold the poles. The joint at their inboard end must be very strong and be able to handle both compression and tension. Securing the poles is the biggest challenge. Ours was rigged so we could swivel the whole thing about 30 degrees for a broad reach. They could also be easily furled again to let a squall pass or simply for a squall or simply to reduce sail at night. Once everything was ready, the sails were unfurled from the cockpit. The furlers allowed the spinnaker poles to be set up on a clear deck (more on this below). We would set the smaller sail to windward. The sails were not the same size but that didn't bother the twizzle. The boat had a solent rig with two headsails - each on a furler. It takes about an hour to set up and another hour to clear away, so this only makes sense when you expect several days of downwind sailing. Sail can be quickly reduced from the cockpit - a huge advantage over a spinnaker. You sail with no mainsail and the boat tracks like she's on rails. Then you'll wrap it around your forestay, but you'll still be hooked. I'd start with a cruising chute and a sock, and some light wind. You stated that you aren't interested in a spinnaker or chute, and I'll admit I've had more than my share of embarrassing spinnaker mishaps, but they're a joy for moving downwind. And if there's lots of wind you probably don't have a problem with the sails you have. It won't perform anything like a spinnaker, especially if there isn't much wind (which so often is the case). That's nice for stability and when there's plenty of wind but otherwise its, well, a drag. In that bikini-shaped configuration it doesn't generate any lift, just drag. I think you'd unfurl it, look at it, and wonder why you aren't moving any faster. But if you're wanting better downwind performance for day-to-day sailing I think it would suck. Easy to set, self-tending, easy to douse, easy to sleep. In both the videos and the Yachting World article it is described as a passagemaking sail or "trade wind" sail for going dead downwind. I don't have any experience with these, but it doesn't look like something I'd add to a sail inventory for general purpose cruising, which seems to be what you're after.
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