Dave:
I can't add much to what Josh has stated. Each Spring, the mast is
stepped, I set the rig tensioned the same as every year.....even if my
boat sits at the dock, the shroud tension will ease a bit...maybe as
much as 100 lbs. or 5% to 7% of the initial tension.
One half turn on my turnbuckle is not a lot of 'actual distance' gained
or losed.....as Josh says "a micro bend"..... however, if I leave the
gauge on the shroud when the turnbuckle is tightened or loosened, it
will move the gauge accordingly.
Without the Loos RT 10, I am merely guessing the rig tension......under
tensioning is obvious when you take the boat out under sail.....over
tensioning is not as easy to detect.
I come from a racing background where rig tension is paramount.....we
were constantly adjusting it to suit the conditions on race
day......sometimes up and down between races on the same day While I
don't race AZURA, old habits like rig tensioning has remained with me.
Rob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2017-06-13 5:45 PM, Josh Muckley via CnC-List wrote:
"How do I gauge?" - this is the argument for paying $500 for the Loos
Tension gauge, otherwise you are just guessing.
I believe there are micro bends, stretches, seating, and flexing
throughout the system which allow the rig to loosen up. With such low
stretch rod rigging only a fraction of an inch can be the difference
between hundreds of pounds of tension and zero pounds.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Jun 13, 2017 12:40 PM, "Dave S via CnC-List" <cnc-list@cnc-list.com
<mailto:cnc-list@cnc-list.com>> wrote:
Timely...
I set up my rigging per the instructions in the owners manual
immediately after launch, and Windstar sat for a few weeks other
than a couple of very gentle sails. Finally got to give her a
righteous thrashing last weekend and I returned with slack upper
shrouds - a bit alarming. Lowers and mids not obviously changed,
mast step not collapsing, chainplates not failing.
I suspect I had not adequately tightened the uppers. A neighbor
explained that his boat changes shape a bit once launched (or
rather, sitting on the cradle all winter distorts it a bit.)
Without a gauge, how do I gauge that ensure that the shrouds are
tight enough? Deflection?
What is it that re-seats and settles when the rig is first set up?
Tx.
Dave
---------- Forwarded message ----------
From: robert <robertabb...@eastlink.ca
<mailto:robertabb...@eastlink.ca>>
To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
Cc: Hugh Briggs <hbri...@tbaytel.net <mailto:hbri...@tbaytel.net>>
Bcc:
Date: Tue, 13 Jun 2017 10:08:46 -0300
Subject: Stus-List Rod Rigging Tension C&C 32
Hugh:
Your rod rigging is probably the same as mine....hopefully your
Loos gauge can measure 'rod tension' and not simply 'wire'. I
have the Loos RT 10 gauge.
According to NavTec, the breaking point of the rod is 8,000 lbs.
and they recommend not exceeding 25% or 2,000 lbs. in our case for
tension of the shrouds.
My uppers are normally around 1,300 to 1,350 lbs......the lowers
1,200 to 1,250 lbs...... that equates to numbers on my gauge of
around 39 to 40 uppers to 37 to 38 lowers. The rig will always
loosen a bit after the mast is stepped and tension first
applied.....mine always does.
At rest, my backstay tension is around 1,000 lbs.....more when the
split backstay is pulled down.
The babystay is approx. 500 lbs.
My rig has been tensioned this way each year since I got the boat
in 2006.
Trusting this is helpful.
Rob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2017-06-12 10:02 PM, Hugh Briggs via CnC-List wrote:
Hello I am the proud new owner of a 1981 C&C 32 and am trying
to set up the standing rigging. I have the use of a Loos
Gauge and would like to know what the tension should be set
at. I initially set it at 15 and went sailing. The rig has
lost a few points and now reads at about 13. Are there tables
for the outer and inner shrouds?
Thanks in advance.
Hugh Briggs
C&C 32
Desiderata
Thunder Bay, ON
Lake Superior
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make a contribution to offset our costs, please go to:
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