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PostPosted: Wed Oct 28, 2020 2:52 pm 
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Joined: Tue May 19, 2020 6:25 pm
Posts: 27
Location: Boiling Springs, SC
I was able to get this all setup some time ago, but was waiting until I had used it as intended to provide updates. Unfortunately, bad weather and bad scheduling means I haven't been able to sail since I set it up.

From the tests I have done, it looks promising, with an un-modification to the halyard hook. I tested the setup with about 10ft of shock cord tied to 10ft of poly line to simulate the sail. What i noticed is that as you hoist, some kind of action between the halyard and the ring causes the doubled halyard line to twist with itself, spinning the halyard ring toward the hook. On multiple tests (untied and straitened everything between tests), the halyard ring would spin 5-7 complete rotations, preventing the ring from reaching the hook.

Now, if you account for that and preload some twist into the lines simulating the sail, it works almost flawlessly. As expected, it doesnt feel like 2:1 when compared to the classic setup, likely due to the friction on the ring, but there is a very noticible, worth while difference. The other issue is where the un-modification comes in. Even when preloading the bungee line, the ring still tilted strongly into the hook, making it difficult/impossible to release since I had removed the flopper. I suspect when using the actual sail, the ring will act like the preloaded bungee, allowing the ring to tilt, but not completely spin. So I un-modified my flopper and put it back and everything works great (in tests).

Some notes about the flopper: I originally took it off because we never once got the hook engaged with it on. We couldn't feel or see the sweet spot. In the successful tests I did with the flopper back on with the 2:1, there is a pair of solid clicks that you can feel in the halyard as you reach the top. The first is going over the hook, the second is going over the flopper. I don't find it necessary or even helpful really, but there is also a click when lowering as the ring falls off the hook/flopper. This makes the flopper SUPER easy and foolproof to use.

Overall, I'm happy with the change, as long as no problems pop up when using the sail. That being said, unless you have problems hoisting your sail (like me), or have other benefits in mind, it may not be worth the cost and effort. Id also like to warn (with no real validating experiences or strength tests): This setup has the potential to easily place excessive force on the head of the mainsail. I could see how the mainsail binding or catching somewhere could rip the head right off. I may be overly cautious here, but perform this mod at your own risk of mainsail decapitation.

Right now, my boat is securely tarped with 3 tarps and about 20 lines, so I don't have pics. I do plan to give it a good scrub down before storing for the winter, so I'll try to remember to get pics then if I don't get another chance to sail this year.

-Kyrle

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PostPosted: Sat Oct 31, 2020 6:07 am 
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Joined: Thu Feb 09, 2012 1:48 pm
Posts: 29
I came across a main that was hard to raise on a scow. It turns out it was the layers of sail cloth used to reinforce the head. The whole reinforced head area would want to rotate and wedge in the mast track half way up. Once I trimmed off a 1/4" of triangular points at the bottom of all the head reinforcing layers, by the bolt rope, the problem went away. That little triangle was hard to find but it was dark gray from getting wedged.


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PostPosted: Sun Nov 01, 2020 1:01 pm 
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Joined: Sat Aug 18, 2018 4:06 pm
Posts: 116
Location: Sydney, Australia
Hi Kyrle,
My next suggestion is to get your sail loft to fit a new luff tape and bolt rope. Over time (about three years) the luff tape and bolt rope and sail body stretch and shrink at different rates and get out of sync. After many years (5+) they are totally out of sorts. A new luff tape and bolt rope re-set with your sail will greatly help your problem and eliminate any need for a 2:1 system and eliminate the need for any silicone or Teflon spray.

A new luff tape and bolt rope will also give your sail a new lease of performance life.

Enjoy.

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John Forbes
Hobie 18 Reimagined
Sail # 490
Boat name: [email protected]
http://www.hobie18.fun
https://www.facebook.com/Hobie18catamaran/


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