Avoiding Boom failure: IMHO, you could check the area where the mainsheet block attaches to the Boom and look for cracks or ovaling of the holes. You can add a second bail through the boom, or change the attachment, so you divide up the point loading. Our boom has two bails so each carry half the load stress that a single bail would carry.
Mid boom sheeting, because it requires more sheet load than end boom sheeting, to shape the mainsail, often spreads the load over three attachment points . Just saying, I've never seen our boom bend from mainsheet (near end of boom), but I have seen it bend from too much vang tension which is close to where mid boom sheeting would attach. Chuck Resolute 1990 C&C 34R Atlantic City, NJ ----- Original Message ----- From: "Pete Shelquist" <pete.shelqu...@comcast.net> To: cnc-list@cnc-list.com, "Martin \"Mac\" McKenzie" <seawor...@rogers.com> Sent: Saturday, January 4, 2014 10:39:48 AM Subject: Stus-List booms on 37 Steve, Dave, Mac and other 37 owners: FYI - There is another 37 in my area in which the boom broke last summer. I’m told it happened right at the mainsheet attachment and in very moderate conditions. Feedback from the shop that made the repair and who spoke with a number of mfctrs re: replacement, the booms of this generation/configuration have a tendency to weaken and break due to any combination of wall thickness, fatigue, point loading, etc. If this is truly a chronic issue or a one-time thing is TBD. For our boat, in the 10 yrs we owned her, I’ve raced two Trans-Superior (300+ miles) and numerous 60-100 milers, both solo and crewed. I haven’t seen the serious bending that Mac described, and don’t have a problem getting decent shape on the leach of the main (and assume it’s not an issue with Mac’s sail). However, I’m going to keep monitoring and am considering proactive strengthening of the boom. Pete 1984 37 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Steve Sharkey Sent: Friday, January 03, 2014 5:13 AM To: Martin "Mac" McKenzie; cnc-list@cnc-list.com Subject: Re: Stus-List Relatively new C&C owner Mac, I also have a 1983 C&C 37 and do a lot of single-handed sailing including distances races. I’d be interested to see pictures or learn more about modifications that you’ve made. What type of autohelm do you have? Steve Sharkey Impromptu From: Martin "Mac" McKenzie Sent: Thursday, January 02, 2014 9:13 PM To: cnc-list@cnc-list.com Subject: Stus-List Relatively new C&C owner Hello All, I have a 1983 C&C 37 that I purchased 2 years ago from RCR yachts in Buffalo. It was named IMPACT and prior to that it was named FREEDOM SONG. I have named it WORTHY PEARL. I sail it on Lake Ontario out of Etobicoke Yacht Club. Prior to this boat I had a Niagara 26 WAVE WALKER that I sailed for 31 years. My son has taken ownership of it now. I am still getting used to her but I think the boat sails extremely well. I have made a number of changes to the running rigging, having everything coming back to the cockpit. I sail mainly short handed and do a lot of single handed racing. My goal this year is to do the Lake Ontario 300 single handed with spinnaker. The biggest change I am making over the winter is moving the traveler from the cabin top to the cockpit. I found that the mid boom sheeting could not trim the main properly. With a loose footed main, the boom would bend and not tighten the leach. I will let you all know if it works. I will keep the original traveler on the cabin top just in case. Mac McKenzie 1983 C&C 37 Worthy Pearl _______________________________________________ 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 CnC-List@cnc-list.com
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