1500-2000 kpsi. whow !!! 1kpsi = 1000psi but I may be confused on units
I think my Navtec adjuster reads in psi, not kpsi. I find 1500-2000 psi OK and sometimes up to and above 2500psi in real heavy air.your boat should take that without cracking IMHO. I have experimented with backstay tension a lot and on my 35 MKII performance does not seem to vary a great deal above 1200 psi...maybe just my design and the way I have my rig setup.I do release tension going downwind and that seems beneficial Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS _____ From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Tim Goodyear Sent: November 24, 2012 12:03 PM To: Dennis C.; cnc-list@cnc-list.com Subject: Re: Stus-List Keel R&R Good point. I do like a nice tight forestay... Upwind setting is between 1500 to max of 2000 kpsi, which I didn't think would be too much. Maybe a couple of longitudinal stringers in between the ribs in that area would help, or living with more sag / less pointing ability. Tim Mojito C&C 35-3 Branford, CT On Nov 24, 2012, at 10:43 AM, "Dennis C." <capt...@yahoo.com> wrote: Tim, Do you have a hydraulic backstay adjuster? Dennis C. Touche' 35-1 #83 Mandeville, LA _____ From: Tim Goodyear <timg...@gmail.com> To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> Sent: Saturday, November 24, 2012 8:55 AM Subject: Re: Stus-List Keel R&R Thanks, Jake. I'll take a look under the anti fouling around the top of the keel stub this year. I've had two yards try to solve the crack at the back of the keel (the C&C frown?), but it is back this year with a little water weeping out. It's (now) all solid fiberglass in that area, so I don't know where the movement is starting. Tim On Nov 24, 2012, at 7:54 AM, "Jake Brodersen" <captain_j...@cox.net> wrote: Tim, We found a number of hairline cracks in the keel stub. They were spread out and not really concentrated in one area. The boat was originally commissioned in Maine. I suspect that it had a hard grounding at some point. I didn't notice any stress at the back of the keel, which is where you would expect to see major damage in a grounding. This past spring when I had the bottom paint soda blasted, we found some longitudinal cracks in the gelcoat and glass on the port and starboard side in the hull, less than a foot from the keel joint. One was over two feet long. They were grounded out and glassed in. It is all faired in nicely now. Jake From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Tim Goodyear Sent: Friday, November 23, 2012 5:26 PM To: cnc-list@cnc-list.com Cc: <cnc-list@cnc-list.com> Subject: Re: Stus-List Cutting my keel Jake, I know you've documented your project, but what did the cracks look like before you started? Mojito has a couple of short hairline cracks at the hull / stub joint on the port side, and at the very rear of the keel. Thanks, Tim _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com <http://www.cncphotoalbum.com/> CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2629/5416 - Release Date: 11/24/12
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