Patrick,
That is correct, the sheaves were made for 1/2″ line. They were fabricated
to match the outside dimensions of the original sheaves, I just had the
original wire/rope groove replaced with one a little more rope friendly.
That said, I know lots of sailors who converted to rope halyards without
replacing the wire/rope sheaves and have not seen any rope wear as a
result. However, I was glad I did it when I went to internal halyards, as
now the rope rides on a single sheave rather than two. I think the chance
of rope wear increased with a single sheave, although I’m just guessing at
that.

On Wed, Jan 27, 2010 at 12:03 AM, Patrick Walters <>wrote:

I’m re-reading a few things:

Thread about Sheaves:
https://www.pearson424.org/bb2forum/viewtopic.php?t=95&highlight=sheave
s/v<https://www.pearson424.org/bb2forum/viewtopic.php?t=95&highlight=sheaves/v>Sarah’s story:
http://www.svsarah.com/Sarah/ewUpgrade2003Rigging.htm#Replace Halyard
Sheaves
Drawing of the original sheaves
http://www.svsarah.com/Sarah/Images/Halyard%20Sheaves.JPG

So, John am I reading all of that correctly that for the main sheaves you
had identically sized sheaves built but with slots for 1/2″ line?

Thanks,
-p

—-
s/v Deep Playa | Pearson 424 Hull #152 | http://www.DeepPlaya.com
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Regards,
John Stevenson
http://www.svsarah.com
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Greetings from Martinique, my frozen friends:

When I first saw the original wire-or-rope masthead sheaves Pearson used it
gave me an idea, i.e., to switch the genoa halyard to all wire. I found a
secondhand wire winch at Sailor’s Exchange for $25, serviced it so that the
innards are like new, and replaced the standard rope winch with it. The rest
of the conversion was painless.

Here’s why I made this change: Wire halyards are generally less handy than
line – that’s why we use line instead – but since we so rarely lower and
raise our roller furling genoas there is no inconvenience factor in this
instance. On the plus side, an all wire halyard eliminates that clumsy,
wasteful coil of line that dangles from the lower port side of nearly every
mainmast in the world, 364 days of the year. It also eliminates stretch in
the halyard after the initial break-in of the wire (although some modern
lines like Stayset-X don’t stretch, either). Anyway, it does tidy up the
work area around the mast. One year and a few thousand nautical miles later
I’m still happy with the conversion.

Tor
~~~~~~~~~~~~~~~~~~~~~~~
Silver Heels, P-424 #17
http://www.SilverHeels.us
~~~~~~~~~~~~~~~~~~

Having seen this on Tor’s boat, I have to agree 100% – I’ve never thought of
this after horror stories I’ve heard about wire halyards, but it has another
advantage over rope – the wire halyard doesn’t bang the mast – at least in
winds less than hurricane strength and I HATE that banging!

Bob

—
Bob Fine
s/v Pelican
Pearson 424 Hull #8
http://thesailinglife.blogspot.com
Follow me at: http://www.tinyurl.com/WhereIsBobFine
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