Delamination is easily checked by sounding the skins with a small hammer or my favorite tool for this, a paint roller handle meant for the mini rollers. Most people have one and it's small, lightweight, but quickly taps the areas and produces a quality ring that signifies solid, and a dull thud signifies delamination. Easy enough to check every time the boat is on the hard.
Chuck Scheaffer, Resolute 1989 C&C 34R > On 07/29/2020 6:41 PM T Sutton via CnC-List <cnc-list@cnc-list.com> wrote: > > > Here is a thought, one time we had a mishap that resulted in the rudder > starting to delaminate and for the first bit of the journey home we had a > similar type of unexplained noise, thunk or what ever. Turned out that the > rudder was delaminating more and faster than I thought and one skin was > essentially delaminated but still attached at the top. Eventually the noise > went away but when we got into port I realised the entire skin had detached > from one side of the rudder. If you have the boat out for the repairs have a > good look at the rudder for delamination. > > Cheers, > > Tom S > > From: Bruce Whitmore via CnC-List > Sent: Wednesday, July 29, 2020 6:13 PM > To: C&C List > Cc: Bruce Whitmore > Subject: Stus-List Unidentified clunk when motoring - 1995 C&C 37/40+ > > Hello all, > > While we were moving our boat to the yard to get it repaired (see my > previous post about a jetski hitting us), we motored about 12 miles. For > reasons I can get into later, we were going only about 4 knots. We were in > the Gulf of Mexico and the going up Tampa Bay in light conditions with > relatively minimal seas. About every 30 or 45 seconds, without any > particular connection to waves, we got a quiet but discernible "thump" or > "thunk" that I could feel through my feet. It seemed to be most noticeable > when I propped my foot on the starboard stern locker. That is the propane > locker. I looked in there, and did not see the tank rocking or other reason > for the noise. > > It did not seem to be linked to waves, as we hit multiple rocking boat > wakes and other wave forms, so I saw no consistency there. Nor did I see any > link to revving the engine, shifting in & out of gear, etc. > > There was no indication of a crab pot bouy or anything else, either, but > I haven't been under the boat. > > Any idea what might be causing the noise? > > Would a failing motor mount cause this, and how would I diagnose it? > > Thanks for your insights, > > Bruce Whitmore > 1994 C&C 37/40+ "Astralis" > Madeira Beach, FL > (847) 404-5092 (mobile) > bwhitm...@sbcglobal.net > > > > --------------------------------------------- > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
