Hi OJ,Oswego John wrote:There are some owners , also shipyard operators in my area, who slack off the shrouds and the stays a few threads before putting their ships under wraps for the winter.
Is this a common practice to ease off the standing rigging while on the hard or isn't it a good idea.? Anyone else do this?
Just wondering.
O J
I think that this is a holdover of the days of wooden boats when boats would change shape significantly as they aged. With those boats, you could actually see the stresses from the rig on the hull. The keel under the mast step often had a bit of a curve and the shear line near the chainplates was often off. For people on the east coast, a classic case was the J&E Riggin which they have worked to correct recently but used to look like the area around the chainplates had been pulled up 4". For these boats, there were very good reasons to slack off shrouds. On the other hand, it often made sense to keep the forestay tight and boom lift/mainsheet tight to help counteract hogging but you did need to block directly under the mast step.
In a fiberglass boat, there is none of the settling that occurs in a wooden boat so I would have no worried about long term damage to the structure. The rigging loads in the winter are quite constant so you don't need to worry about fatigue (slacking everything a lot and letting the mast whip around could cause fatigue and could also knock your boat over). Out of curiosity, I threw on a tension gauge after hauling once and didn't see a noticeable difference from the tension in the water. Personally, I can't see a reason to go to all the trouble and I suspect it could actually be worse for the boat to slack things off.