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
<mailto: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 <mailto: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
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