Interesting discussion about backstays. My 34+ has developed a series of cracks in the gelcoat below the backstay attachment point on both sides of the transom. I have the split backstay with pulley adjustment. I am not sure when the cracks started, but they have gotten worse. Not through the hull (no water leakage) but a surveyor and a fiberglass guy both suggested I do something about it. Both sides have stainless steel backing plates which I would have thought sufficient. One of the problems with the split backstay/pulley adjustment is that I have no idea how much force I am putting on the hull when I crank the backstay. I did not think it was possible I could be doing damage, but something has happened. Anyone else had this problem?
In any event, it is being fixed this winter by repairing the cracks and adding a glassed in support tying the transom to the hull. Dave S/V Aries 1990 C&C 34+ New London, CT > On Jan 4, 2017, at 9:02 PM, Chuck S via CnC-List <cnc-list@cnc-list.com> > wrote: > > FWIW, I looked into splitting the backstay for my 34R and determined I would > forgoe using U Bolts and substitute a length of Stainless Tee section from > McMaster Carr. That would allow me to shape the Tee bar into a proper tang > with one hole for the backstay and six to eight bolts through the transom. > It's easy to beef up the transom area by adding layers of glass inside and > spread the load further using a large aluminum backing plate. When I priced > the 10,000# rated pulley needed for the backstay and faced hiring a rigger to > shorten the backstay, I put the project into a folder marked, "If I ever win > the lottery". > > > > The point of all this is to encourage those who want the boat. Reinforcing > is a nice winter project; remove the U-bolts, apply layers of glass, add > backing plates, make it better. > > > > Chuck > Resolute1990 C&C 34R > Broad Creek, Magothy River, Md >> On January 4, 2017 at 7:04 PM Josh Muckley via CnC-List >> <cnc-list@cnc-list.com> wrote: >> >> Follow the link below. Find a transom picture - there are many. The humps >> on port and stbd top corners are the attachment points for the hydraulics. >> On Michael Cotton's boat, Blue Pearl, there was only a single hydraulic >> piston which attached on the port side. This piston pulled down against a >> turning block attached to the backstay which transfered half the load to the >> starboard side. The humps have a horizontal portion where a standard u-bolt >> extends through. It is hard to tell but the load distribution has >> relatively limited surface area. Even if it had (and it doesn't) a custom >> strongback designed to fully engage the horizontal section of the hump, it >> is still a considerable amount of point loading. I've visualized all manner >> of correction for this perceived weakness but continue to fail to take >> action. >> >> It is my belief that while a better design is/was possible, only one boat >> has had a failure. Evaluating that single known failure on that boat shows >> that it is also possibly the only boat with a signal hydraulic ram. Maybe a >> hangup in the turning block caused an unequal distribution of the load >> resulting in the failure. >> >> I watch mine and consider pursuing the reinforcement from time to time. >> >> https://plus.google.com/117078816966198897128/posts/2qzHVRgqeVz >> <https://plus.google.com/117078816966198897128/posts/2qzHVRgqeVz> >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> >> On Jan 4, 2017 2:21 PM, "Mark Baldridge via CnC-List" <cnc-list@cnc-list.com >> <mailto:cnc-list@cnc-list.com>> wrote: >> Tom, >> >> I looked at the boat about when the photos were taken and prior to the >> listing going up. The backstay is currently disconnected while the >> hydraulics are out being rebuilt. They are currently tied off to the stern >> pulpit. If you look close at the main picture you can see attachment point >> next to where the hydraulic line exits the deck. >> >> I assume that this is standard. >> >> Thanks, >> Mark >> >> On 1/4/2017 1:55 PM, Tom Buscaglia via CnC-List wrote: >>> Hey Mark >>> >>> I took a look at Ogopogo, the 37+/4- in Fairhope,online. Since this string >>> started with questions about the back stay on these boats, I was wondering >>> about the set up on the one you're looking at. They seems to have been >>> relocate inboard from their original location on the transom. I'm curious >>> as to why this was done. Any idea or explanation given? >>> >>> GL with the purchase...I am a huge fan of the 37+/40! >>> >>> Tom B >>>> ------------------------------ >>>> >>>> Message: 2 >>>> Date: Tue, 3 Jan 2017 21:17:34 -0500 >>>> From: Mark Baldridge <jmbaldri...@gmail.com> <mailto:jmbaldri...@gmail.com> >>>> To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> >>>> Subject: Re: Stus-List C&C 37+ Backstay Inspection/Improvements >>>> Message-ID: <6afc5ca3-ac75-7fc3-a725-64d0a88e0...@gmail.com> >>>> <mailto:6afc5ca3-ac75-7fc3-a725-64d0a88e0...@gmail.com> >>>> Content-Type: text/plain; charset="windows-1252"; Format="flowed" >>>> >>>> Good luck Bruce! >>>> >>>> Our survey is the 10th of January on the 1989 37/40+ out of Fairhope, >>>> AL. hull #30 (ex Dakota). Hoping for a good pass as well! >>>> >>>> Mark Baldridge >>>> ~~~~~~~~~~~~~~~~~~~~~~_/) >>>> '75 C&C35 MKII "The Edge" >>>> Surf City, NC >>> Tom Buscaglia >>> SV Alera >>> 1990 C&C 37+/40 >>> Vashon Island WA >>> (206) 463-9200 <> >>> www.sv-alera.com >>> <http://www.sv-alera.com/> >>> >>> >>> _______________________________________________ >>> >>> 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 <https://www.paypal.me/stumurray> >>> >>> All Contributions are greatly appreciated! >> >> >> _______________________________________________ >> >> 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 <https://www.paypal.me/stumurray> >> >> All Contributions are greatly appreciated! >> >> _______________________________________________ >> >> 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! > _______________________________________________ > > 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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