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DW
Joined: 07 Sep 2017 Posts: 43 City/Region: Mount Vernon
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Wicked Pissah
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Posted: Fri Jun 29, 2018 11:38 pm Post subject: Depth Sounder - Cored Hull |
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Can anyone verify that on a C22 the hull is or is not cored? I'm installing a depth sounder soon and need to know if there is solid fiberglass at the keel area or cored?
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CaptainJeff
Joined: 25 Dec 2016 Posts: 11 City/Region: Olympia
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: HAWSEPIPER
Photos: HAWSEPIPER
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san juanderer
Joined: 12 Aug 2014 Posts: 235 City/Region: Stanwood
State or Province: WA
C-Dory Year: 1990
C-Dory Model: 22 Angler
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Posted: Sat Jun 30, 2018 12:17 pm Post subject: |
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Don't you hate it that the boat builder would penetrate the core, but not seal it properly ! Such a shame. _________________ Cdory 22 Angler
SeaSport 24XL, Etec 250 hp (sold)
Rosborough RF246 (sold)
Commander 30 Sportfish (sold)
Olympic 26 XL (sold)
Glassply 19 (sold)
Olympic 23 (sold)
Bayliner 38 Motoryacht (sold)
Olympic 20 (sold)
Fiberform 16 (sold)
Olympic 18 (sold) |
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thataway
Joined: 02 Nov 2003 Posts: 20810 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Sat Jun 30, 2018 12:26 pm Post subject: |
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Capt Jeff,
Nice job and well documented.
The hull is cored up to the bulkhead between the V berths and the main cabin. There is a depression, in some of the boats just inside the cabin, aft bulkhead, where a bilge pump is installed. Some of the boats have partial core still under this area You can cut the inner layer of the bottom, and remove the core--and then re-inforce that part, with extra layers of glass and resin. I personally prefer epoxy, because it has better secondary bonding strength than Polyester. Some use vinyl ester which has strength between the epoxy and polyester.
If you want to test areas, put the transducer (a transom mount can be used) in a plastic baggie of water or mineral oil, and lay it on the bottom of the boat. If it is cored there will be no or very minimal transmission of the impulses, and you will not get a usable sonar image.
For non cored hulls, I have made a plywood and epoxy/fiberglass cloth box inside the hull, put the thru hull transducer into the lid, with a port to fill the box which is glassed to the hull. Then I fill the "bottomless box" with mineral oil. Had good echos thru 3/4" solid glass to over 600 feet. _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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