You are combining two issues.

  1.  Is the boat sound now? A good surveyor is the key to this. All these 
boats are old and all can have issues, cored or not cored.
  2.  Damage from reefs and rocks. At the point the hull has holes in it, the 
boat is in bad shape regardless and will need to be hauled and repaired if that 
is even possible. Sure the core will need replacing in the damaged areas, but 
that will be the least of your problems. End-grain balsa does not let water 
spread easily, so it isn’t like the whole core is saturated in a day.
I would not hesitate to sail a cored boat because of potential damage from 
collisions. My uncored boat would be totaled pretty quickly if she were holed 
on a reef with waves washing over. If I could get loose and patch a minor hole, 
I could also get loose and patch a hole in a cored hull too.

Joe Della Barba
Coquina


From: Shawn Wright via CnC-List <cnc-list@cnc-list.com>
Sent: Monday, March 20, 2023 7:06 PM
To: Stus-List <cnc-list@cnc-list.com>
Cc: Shawn Wright <shawngwri...@gmail.com>
Subject: [EXTERNAL] Stus-List Cored hulls feedback wanted

As we once again consider a boat with cored hull (LF43 or LF38), I am reminded 
of why we eventually chose our current 35 four years ago. I couldn't be sure of 
the hull integrity without an expensive survey, and at the low price range we 
could afford, avoiding a cored hull just removed this concern.

But as I understand it, most C&Cs over 35' have been cored since the late 60s 
or early 70s depending on the model, so that includes a lot of boats, most of 
which are probably still sailing, albeit mainly coastal cruising or racing. Now 
as we consider the next boat for our long term offshore boat, things like 
potential hull damage from a reef or a collision in a remote part of the world 
are a concern.

So I am interested in hearing about experiences with cored C&Cs, problem which 
have occurred under both normal use and as a result of damage from impact, and 
how effectively they could be repaired.

I guess an additional question is how C&C's balsa coring compares with modern 
day foam coring, either with or without vacuum bagging. I assume foam has some 
advantages in not absorbing water.

Thanks.
--
Shawn Wright
shawngwri...@gmail.com<mailto:shawngwri...@gmail.com>
S/V Callisto, 1974 C&C 35
https://www.facebook.com/SVCallisto
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