"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> 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> > To: cnc-list@cnc-list.com > Cc: Hugh Briggs <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 > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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