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 Replacing backstay		  New Topic  Reply to Topic
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codyc
Deckhand

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USA
1 Posts
Initially Posted - 02/05/2021 :  12:47:57  Show Profile  Reply with Quote
I will be replacing my standing rigging this spring. My boat has a split backstay, and I was wondering if I replace the split backstay with the stays from Catalina direct, do I also need to replace the pulleys and hardware that operate the tensioning mechanism, or just the stays?

Stinkpotter
Master Marine Consultant

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Djibouti
9013 Posts
Response Posted - 02/05/2021 :  21:20:46  Show Profile  Reply with Quote
I took a look at CD's backstays--they have retrofit kits for converting single to split adjustable stays, which include things like an additional chainplate and the adjuster hardware--not what you need. They also offer the top wire, and separately the bridles (lower wires running to the chainplates)--I'm guessing you want both the top and lower wires. You can call them and discuss it.
Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge
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Leon Sisson
Master Marine Consultant

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USA
1889 Posts
Response Posted - 02/10/2021 :  10:19:16  Show Profile  Visit Leon Sisson's Homepage  Reply with Quote
Cody,

I would evaluate the condition of the backstay tensioner hardware independently of the stays.

When I replaced my standing rigging, I went with cable from Brion Toss Yacht Riggers and Sta-Lok swageless terminals.  At the time, Brion Toss had some 1x19 SS wire rope with the corrosion resistance of 316 and nearly the strength of 302/304.

While replacing standing rigging, this would also be a good time to consider better turnbuckles if yours are closed body or your cables have swaged threaded terminals.
— Leon Sisson
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waterbaby
Navigator

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USA
168 Posts
Response Posted - 03/29/2021 :  17:39:59  Show Profile  Reply with Quote
We're thinking of replacing all standing rigging and our backstay is a single line leading about 12-18 inches off the center of the stern with a pigtail attached.

Is that the normal placement for a single line backstay? We've never had a problem with it but it seems like it should have been a split backstay to get the proper alignment.

Just wondering if the PO changed the original config. The pigtail makes me think it was the original backstay but the alignment makes me question it.
1986 TR/SK #5250 Sunshine
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 03/29/2021 :  17:51:43  Show Profile  Reply with Quote
The single backstay is offset and is normal. It would be in the way of the tiller if it was on the centerline of the boat.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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waterbaby
Navigator

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USA
168 Posts
Response Posted - 03/29/2021 :  17:58:59  Show Profile  Reply with Quote
Thanks Scott!
1986 TR/SK #5250 Sunshine
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Steve Milby
Past Commodore

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USA
5851 Posts
Response Posted - 03/29/2021 :  18:07:26  Show Profile  Reply with Quote
quote:
Originally posted by waterbaby


Is that the normal placement for a single line backstay? We've never had a problem with it but it seems like it should have been a split backstay to get the proper alignment.
That's the normal placement for the backstay. The backstay has to be slightly offset to one side on any sailboat like a C25 that has a transom-hung rudder. Imagine that the backstay was attached to the hull in the exact middle of the transom. You wouldn't be able to swing the tiller past the backstay. The way to avoid that is to either offset a single backstay or to use a split backstay that straddles the tiller.

Offsetting the backstay doesn't affect the performance of the boat at all. The erectness and straightness of the mast is governed by the adjustment of the shrouds. The backstay provides tension to prevent the mast from leaning forward. The fact that it's slightly offset doesn't matter. If your rig is tuned correctly, it will have the exact same shape as a rig with a split backstay.
Steve Milby J/24 "Captiva Wind"
previously C&C 35, Cal 25, C25 TR/FK, C22
Past Commodore
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waterbaby
Navigator

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USA
168 Posts
Response Posted - 03/29/2021 :  19:26:33  Show Profile  Reply with Quote
Thanks for the further information Steve, makes sense.

I just watched a video on using an adjustable backstay.
I was wondering if anyone had any experience with it and what they thought of it.
1986 TR/SK #5250 Sunshine
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Steve Milby
Past Commodore

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USA
5851 Posts
Response Posted - 03/29/2021 :  20:15:32  Show Profile  Reply with Quote
A backstay adjuster on a masthead-rigged boat is great if you know how to tune the rig correctly.

It's a common misconception that a backstay adjuster on a masthead-rigged boat helps the boat sail closer to the wind. You can only tension the backstay so much, and, if you tension it beyond that, the boat won't sail any closer to the wind and you could damage the boat structurally. On a C25 it only helps the boat sail in light air and downwind, because it enables you to power up the sails. When you ease the backstay tension, you induce forestay sag, which powers up the jib.

The reason for the misconception is that a backstay adjuster does in fact help a boat with a fractional rig sail closer to the wind, but it works differently with a masthead rig like a C25.

Most sailors are satisfied without a backstay adjuster, and the boat sails well. The only people who really want one are people who really enjoy playing with sail trim adjustments. It's a nice tool to have but you have to learn how to tune a masthead rig with a backstay adjuster, and how to use it.

There's not much reliable information online about using a backstay adjuster on a masthead rig. If there's a video about it, I haven't seen it.
Steve Milby J/24 "Captiva Wind"
previously C&C 35, Cal 25, C25 TR/FK, C22
Past Commodore
Edited by - Steve Milby on 03/29/2021 20:25:02
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.