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Old 29-09-2011, 10:07   #16
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Re: moving or splitting aft stay

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Originally Posted by goslin View Post
... if this is a dangerous thing to do to a boat! Because this rigger I talked to acted like it was no big deal, and like he has done many times before.
Done what?
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Old 29-09-2011, 10:09   #17
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Re: moving or splitting aft stay

put an inverse "Y" on the aft stay
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Old 29-09-2011, 10:12   #18
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Re: moving or splitting aft stay

Gord - i have seen that piece by toss before, it was pointed out to be when i questioned the merits of dual backstays, as that is what my boat came with...

with the upmost respect for mr toss. i still do no understand the inherent logic behind his argument...

a boat with dual back stay will have the same # of clevis and cotter pin connections to fail as a boat with a split back stay (actually one less)... the boat with duals has 2 less wire termination points to fail...

if you back stay is split, and the windward one breaks i imagine it would have the same result as if that happened with dual backstays...

i am not saying one is better then the other but that they are equally good/bad and other then weight/windage concerns are equally as good/bad as a single...

your thoughts...
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Old 29-09-2011, 10:15   #19
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Re: moving or splitting aft stay

Thanks Gord. I need to know what you know. Can you send me ALL your links????
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Old 29-09-2011, 10:26   #20
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Re: moving or splitting aft stay

I was considering this change for the same reasons as the OP after I bought the "new" boat. Several people counseled patience suggesting that the midline backstay was not as big a deal as I anticipated. I'm 6'3" so was particularly worried about banging my head. After one season, this is no longer on the wish list. The central backstay makes for a good handhold coming up the stern ladder. When sailing, I'm rarely on the midline and under power, I don't even notice that I stand slightly to one side or the other.

I'm not suggesting that this is the right answer for the OP, but, if the boat is new to you, consider trying it as is before spending a lot to make the modification.
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Old 29-09-2011, 10:27   #21
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Re: moving or splitting aft stay

Quote:
Originally Posted by Matt sachs View Post
... Can you send me ALL your links????
Certainly.

Here ➥ Let me google that for you

And here ➥ Just ****ing Google It

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Old 29-09-2011, 11:17   #22
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Re: Moving or Splitting Aft Stay

...or maybe I'll just google it
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Old 29-09-2011, 11:19   #23
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Re: moving or splitting aft stay

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Originally Posted by GordMay View Post
Certainly.

Here ➥ Let me google that for you

And here ➥ Just ****ing Google It

I like the second link. May I borrow it? Promise to return it when I'm done.
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Old 29-09-2011, 11:24   #24
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Re: moving or splitting aft stay

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Originally Posted by GordMay View Post
I was wrong! Put the tang plate as high as is reasonably practicable.

As the angle between the horizontal transom deck and the Y backstay rising to the triangle plate decreases, the resultant load on each leg increases. A 30 deg. load angle doubles the tension.

Accordingly, a higher split point would be structurally preferable* to a lower one.

* Notwithstanding a slightly higher weight aloft & etc (as you noted).
Oh no. Let me look outside to see if the sky is falling.

Well, it has been a (long) while since I took the structural dynamics class but I was thinking that from a loading basis higher would be better due to the reduced angle, etc. Just thought there was some other issue I hadn't considered.

Would think also, based on the comments about failure of one leg, that IF one leg did fail, the higher attachment point would result in less slack in the system than a lower attachment point and then support the rig a little better on the remaining leg.
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