Jib halyard tensioner

Moderator: GreenLake

Re: Jib halyard tensioner

Postby GreenLake » Fri May 24, 2019 11:57 am

It won't, but it can be moved (when not under tension). That's the idea.
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Re: Jib halyard tensioner

Postby tomodda » Fri May 24, 2019 12:59 pm

Looks like a good plan! I'm still busy trying to convince my crew to tension the halyards decently just on the main line, will worry about tensioners some other time.
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Re: Jib halyard tensioner

Postby GreenLake » Fri May 24, 2019 1:25 pm

You simply can't get decent tension with the halyard, at least not the way it's rigged on my boat. When I jury rigged the first attempt at a tensioner, it was child's play by comparison.
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Re: Jib halyard tensioner

Postby jalmeida51 » Sat May 25, 2019 5:37 pm

Yesterday I rigged my jib halyard almost the same way that is shown on the Hobbie Cat. (picture on another post ) I put the cheek blocks on the side of the mast and ran the bitter end through a standup bock the by the mast tabernacle. Ran it through a bulls eye to a cam cleat on the cabin roof. I have more purchasing power and the halyard is much tighter now. It will be interesting to see if there is enough purchasing power to make the luff smooth and flatten the jib. Tomorrow winds 15, good day to see if this helps.
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Re: Jib halyard tensioner

Postby GreenLake » Sat May 25, 2019 6:23 pm

BTW, "purchasing power" is the economic term -- in this case its simply "purchase".

I've looked at the Hobie Cat image but can't see where it has an increased purchase. at all. It seems to have a 1:2 and 2:1 back to back, cancelling each other.
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Re: Jib halyard tensioner

Postby GreenLake » Thu May 30, 2019 9:45 pm

Some results.
When I tested the Prusik loop manually it held firm, but we found that on the boat it slid under load.

The halyard tail is a bit different material, although same diameter as the rope I used for testing.

Luckily, the place where the tail is spliced to the halyard has a slight bump and we could fix the issue by moving the loop above it. The 2:1 was sufficient to easily control and set the desired tension in moderate conditions.

Now we need more practice. It's easy to spot when there's insufficient tension, as the luff will scallop, but it's harder to notice when tension needs to come off again.
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