Hi Monty- Thanks for pointing that out. I had read it a while ago, but forgot about it. One thing I still find confusing is the backstay. With the split wire backstay, no matter where you have the car, it is putting tension on the mast. The amount of tension would depend on the tightness of the turnbuckles in the back. So in what state do you measure the rake? With the backstay removed or with the adjuster in its loosest position? Once adjusted, how does one set those rear turnbuckles? Dave
On Aug 2, 2015, at 9:44 AM, Monty Schumpert via CnC-List <cnc-list@cnc-list.com> wrote: > David, > Check out the article "Rod Rigging -- Generic Tuning" by Greg Cutter in the > Do It Yourself section of the C&C Photo Album and Resource Center. I'm going > through the same process after re-stepping the mast on my 34+ this spring. > > Monty > Scandia > 1991 C&C 34+ > Annapolis, MD > > On Fri, Jul 31, 2015 at 11:59 AM, David Knecht via CnC-List > <cnc-list@cnc-list.com> wrote: > I took a good look at my furler, mast, shrouds and stays yesterday > preparatory to trying to do some mast tuning. I am unsure as to the best way > of going about this process and could use some advice. > I found that I was raked somewhere between 18 and 24 inches aft, which is > much too far by all accounts, so I want to bring the mast back to 6-12 > inches. I have read the guides, but it is the specifics of different > mast/shroud/stay combinations is what I am unsure about. It was more > straightforward on my previous 34. My mast has no adjustment possible at > the base or through deck unlike my old one. As near as I can tell, it is all > done with shrouds and stays. The backstay is a split wire with a pinching > car that runs up and down to control backstay tension. The backstay wires > runs to two turnbuckles on the transom. The spreaders are only slightly > swept back but the rod shrouds run to a position just behind the mast. One > runs to the top of the mast and the other part way up, both passing through > the same point on the lower spreader. The top ones are extremely tight, with > no flex/sag on the leeward side when sailing upwind. The lowers are a bit > less tight but still no sag. There is a third rod, which I am forgetting > where it terminates on the mast, but presumably lower down. Forestay is on a > Harken furler. > So how to proceed (or wait for the Rendezvous and get all the great minds > together for a tuning session!) > 1. Should I disconnect the backstay before doing anything with the shrouds? > The car on the split stay can only go so high without running out of wire, so > even at its topmost position, it is putting some tension on the backstay. I > can tie another line to it and let it run up further but it makes more sense > to me to remove them altogether or loosen the turnbuckles as much as possible. > 2. Presumably, I would then loosen all the shrouds and then tighten the bolt > on the furler to bring the mast forward, then recheck rake after tightening > the shrouds somewhat? > 3. After adjusting rake, how would the tension of the backstay be adjusted? > Presumably minimal tension with the car at its topmost position? The > tightness of those turnbuckles is going to affect the amount of tension the > adjuster is able to generate, so that would seem an important adjustment, but > I have not seen any guide to how to set that. > 4. When to check the rake? With the backstay loose/disconnected or in its > nominal highest position? > 5. One thought I have had is that before doing any of the above actions, I > should recheck the rake with the backstay removed just to see if it makes any > significant difference. I know they were removed to take the boat out of the > water last fall and again in the spring, so how the yard guys re-tensioned > them I have no idea and I have not further adjusted them. > Thanks- Dave > > Aries > 1990 C&C 34+ > New London, CT > > <pastedGraphic.tiff> > > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > Aries 1990 C&C 34+ New London, CT
_______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
