Hi Josh,I highly respect your opinion, but on this one I have to differ. Rob Ball, the designer of many of our boats, dispelled this a number of months back. If you think about it, the actual amount of weight held by each bolt is actually quite small in comparison to the compression forces generated by torquing each of those bolts to spec.Food for thought,Bruce1994 C&C37/40+"Astralis"Sent from Samsung tablet. -------- Original message --------From: Josh Muckley via CnC-List <[email protected]> Date: 4/24/20 11:16 AM (GMT-05:00) To: C&C List <[email protected]> Cc: Josh Muckley <[email protected]> Subject: Re: Stus-List Keel movement in C&C 24 Chris,The prevailing wisdom of this list suggests that the keel bolts only be torqued while the boat is resting on its keel, generally about 60% of it's weight depending on the design. In this way you are not turning the nuts against the weight of the keel or even trying to compress the bedding material. IMO, it is likely that you will find more movement in the nuts when you retorque on dry land.I am not familiar with the design of your particular boat but some boats have keel bolts which are entirely inaccessible with the mast in place. Make sure there isn't one (or two) hiding somewhere.Josh Muckley S/V Sea Hawk 1989 C&C 37+Solomons, MDOn Thu, Apr 23, 2020, 20:59 Chris Bennett via CnC-List <[email protected]> wrote:Status update: I ended up torquing the keel bolts. They were not incredibly loose but all of them needed tightening, two by a turn or more and the other two by less than a turn. I will know if this removed the keel movement when the boat is next hauled out, although I am also thinking of diving on her to see if I can detect any wiggle that way (I live in BC and the water is pretty cold but manageable for a few minutes with a wet suit - I hope!). I believe that a very small looseness in a narrow keel root would result in a fairly noticeable movement at the tip of a 3 foot keel - even 1/8 inch of movement over 2 inches width would translate into a couple of inches at the tip, if I have that right. So hopefully this was the issue!I took Drifter for a sail today after rebuilding the mast step and did not notice any flexing or movement in the floors or hull (made pencil marks on the floors and adjacent hull skin and checked on different tacks). I also checked the tabbing under the settees on one side and found it intact, so suspect that the surveyor may have jumped to conclusions when he said the hull had been compromised and that was what was causing the keel movement. Thanks again to everyone for their suggestions.Chris _______________________________________________
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