Guess I'm wondering what the wave state was. If you had 2+ foot seas, you may want a bit of sag for power. If the seas were flat then I could see a fairly straight forestay but not at the risk of damaging the boat.
I rarely use more than 1100 lbs on my Navtec. I've seen a "smile" at the aft end of the keel on haul out and suspect excess backstay tension as the culprit. I've found my 35-1 likes a bit of sag even in heavy air. Seems to open the slot ever so slightly and allow the boat to "breathe". Dennis C. Touche' 35-1 #83 Mandeville, LA On Thu, Jun 12, 2014 at 6:54 PM, Alan Bergen via CnC-List < cnc-list@cnc-list.com> wrote: > Tim: > > It's important to know the force being applied, not the pressure. Force > is equal to pressure multiplied by the area of the hydraulic cylinder, and > all cylinders are not the same. There's a Navtec manual on the photoalbum > web site. Find out which hydraulic cylinder you have, and look up the > cylinder's area in the Navtec manual. The C&C 35 uses #10 rod, with a > breaking strength of 10,300 lbs. Recommended preload limit is 25% - 33% of > breaking strength, or 2600 - 3,400 lbs. Absolute preload limit is 40% of > breaking strength or 4,100 lbs. You can use these numbers to figure out > the recommended and maximum pressures based on your cylinder size. You can > also order a free, force ring label from Navtec to apply to your hydraulic > gauge. Remember to specify cylinder size when ordering the Force ring > label. > > Alan Bergen > 35 Mk III Thirsty > Rose City YC > Portland, OR > > Hi all 35-3 racers (and others with hydraulics), how much do you tension > your backstay to get an acceptably straight forestay in 20-25kts? We were > racing in that last night and our forestay was way looser than I wanted > with the backstay at 2000psi (2 on the hydraulic panel). I have never gone > above this before (1.8 seemed to be plenty for most conditions last year), > but wondered what others maxed out at. > > I think the backstay is -10 rod with associated cylinder and we have a > navtec panel that manages both backstay and vang. > > Thanks, > > Tim > Mojito > C&C 35-3 > Branford, CT > > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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