My $0.10 We are actually talking about a very small interference causing this issue.
Maybe 1/8-3/16 in my case. Consider, maybe ; · The joiner work was done in the build shed, by finish cabinetmakers who worked and fitted doors, based on a premise of keeping gaps parallel and to a minimum. · Boat in a cradle, no rig, beam possibly wider than if she was in the water. (no water pressure on the hull) · Likely a design person gave them a design gap, considering their calcs for hull flex to consider, or likely not. · The resultant quality and aesthetics were, and still are, impressive, especially for the LF 38. · No one may have considered A.R. folks like me, cranking on the Navtec, and sailing in higher winds. Regardless of Fibreglass/Carbon/Aluminium or Steel, when you apply the combined load of 3 x shrouds per side, the hull will distort somewhat. In this case the mast is pushing down , the shrouds are pulling up, the natural reaction is to shorten the distance between the two, and that is the beam. It is not necessarily that the hull has gone soft, or the balsa is rotten. Rough math. 3 x 0.250 Rod at 10,300 breaking x 17% = 5,253 lbs or 2.5 real tons per side. ish. The mast is <>55 ft, so for the hull to move inboard only 1/8 per side, is not just acceptable, it is an incredible testament of what C&C built. Try that with a J*****u, or something. Solution = Make the gap wider, properly. Enjoy the tight rigging, and lack of stretch in the Rod. John LF38 From: Mack McKinney [mailto:m...@woodnboats.com] Sent: August-11-17 5:36 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List Can't close the v-berth door We had a similar, although not precisely the same, problem with our C&C 30 several years ago. We found that when the rig was in racing tune, the head door would not close properly, and would often launch itself in an unwanted attempt to close itself at high velocity whenever we were on a port tack. Of course, it would make a high velocity correction whenever we would tack. We also found that getting into the holds below the forward dinette settee would lock up tight until we released all stay tension. What we found was that the bulkhead had not been tabbed to the deck. Not really a matter of inadequate tabbing, more a matter of no tabbing. I don't know if that was an oversight, a design "feature", or what. You might investigate whether you have adequate tabbing on that bulkhead -- obviously a properly tabbed bulkhead will aid quite a bit of overall stiffness and longevity. I'd like to say we simply took a few minutes to tab in the bulkhead and life was good, but to my everlasting dismay we sold the boat. But that's a story for another chapter. Mack On 8/11/2017 2:48 PM, Patrick Davin via CnC-List wrote: I wouldn't say that's the opposite problem, that's the same as my situation. Maybe you were referencing a couple of the other posts though where they had the frame/door issue at the top/bottom edges. My feeling is it doesn't indicate a serious issue, but you should check bulkheads and rig just to be sure. I think it probably doesn't take much flex to close the relatively tight tolerance gaps in bulkhead doorways (~1/8"). Plus the bulkheads may not have been perfectly cut to the contour of the hull to begin with. Wood is flexy. Not so much longitudinally usually, but 1/8" over an 8' section is only 0.13% compression. Deck-stepped masts can still have flex-related issues, and I'd think it's harder to counteract the pressure on the deck than it is on the keel. Welcome to the list! I think you're the first C&C I've heard of from Finland. On Fri, Aug 11, 2017 at 10:18 AM, Matti Airas <mai...@iki.fi> wrote: Hi all, (Cheers, I'm new to the list - I got a 1980 C&C 36 a year ago in May and have been sailing and fixing/improving her since. Calling from Helsinki, Finland.) It's kinda funny, I have an opposite problem. The V-berth door doesn't close when the shrouds are tightened, but that's because the door frame gets too narrow. The difference between having a deck-stepped and a keel-stepped mast, I reckon. :-) I've been wondering is that nothing to be concerned about or does that indicate an issue with the bulkheads? They shouldn't easily compress at all, anyway. Best, Matti On 10 August 2017 at 21:43, Patrick Davin via CnC-List <cnc-list@cnc-list.com> wrote: I've had this (minor) issue over a year where we can't fully close the v-berth door on our Landfall 38. At first I thought it was just due to heat expansion of the wood in the summer, but it started roughly after I tightened the main shrouds a couple turns (due to masthead fall off in higher winds). And this winter when I had the mast out for rerig I noticed the v-berth door closed fine. Is this just normal flex for C&C's? Anyone else had this issue? It's binding at the door jamb and the lower right half of the door. I tried to check the bulkhead to hull and deck joints, but it's hard to inspect those much since they're covered by a permanent liner. Releasing backstay tension doesn't help. So I suspect it's the fwd lowers or main shrouds that flex the hull the tiny amount needed to squeeze the door frame. I double checked that the tie rods are adequately tensioned and there's no upward inflexion of the deck at the U-bolts. The only thing I can think to do would be to sand down the lower half of the door edge and revarnish it. -Patrick 1984 C&C Landfall 38 Seattle, WA _______________________________________________ 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!
_______________________________________________ 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!
