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Wandering Sagebrush
Joined: 21 Jan 2005 Posts: 2783 City/Region: Northeast Oregon
State or Province: OR
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Constant Craving
Photos: Constant Craving
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Posted: Thu Aug 18, 2011 6:07 pm Post subject: |
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Tug wrote: | Went out fishing 5:30 AM, took me a hour to do 18 miles because of the heavy fog. The transducer was not working very good at all ,i kept losing the bottom,at all speeds. My next option is to lower the transducer,move it to the Starboard side and also make sure that the transducer is not in-line with the skeg. Tug |
Tug, the transducer for my C80 is about a foot left of the centerline, and just a tad below the bottom. Try and determine where you have the cleanest flow of water. If there are bubbles in the area when you're going fast, that would not be a good location.
Good Luck!
Steve _________________ "And in the end, it's not the years in your life that count. It's the life in your years." - Abraham Lincoln |
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CaptainChris
Joined: 11 Jan 2010 Posts: 9 City/Region: Dallas
State or Province: TX
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Posted: Thu Aug 18, 2011 6:58 pm Post subject: |
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All boats, regardless of hull design, at speed, create turbulence. There simply is no "smooth" or clean flow of water. It doesn't exist...they all create a mess, but folks keep looking for it in the most dangerous sort of ways. A transom-mounted transducer "snugged" up to the transom on its bracket is exacerbated when "shoved" below the running surface in the "trough" is bound to create sounding issues. This is what we have been taught, so that's what we do. By moving your high speed transducer aftward from the boat transom and by elevating the face into the naturally rising slipstream of displaced water created by your boat, employs a corrective advantage toward improving a transducer sounding by reducing or eliminating transducer drag, spray and/or turbulence and those obnoxious rooster tails. |
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Spike
Joined: 21 Oct 2006 Posts: 572 City/Region: Kent
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 22 Cruiser
Vessel Name: Bootleg Hooch
Photos: Bootleg Hooch
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Posted: Thu Aug 18, 2011 8:21 pm Post subject: |
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I can't remember where I heard about it but it does work. Try putting some dish soap on the bottom of your transducer before you launch. It is not a cure all but I found that it does help for awhile _________________ Chuck
Bootleg Hooch |
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CaptainChris
Joined: 11 Jan 2010 Posts: 9 City/Region: Dallas
State or Province: TX
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Posted: Fri Aug 19, 2011 5:33 pm Post subject: |
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Spike wrote: | I can't remember where I heard about it but it does work. Try putting some dish soap on the bottom of your transducer before you launch. It is not a cure all but I found that it does help for awhile | Soaps and detergents are water surfactants and have a tendency to reduce the surface tension of water which causes it to "shed its skin" and spread out. Before there were very many rules at all, we used to wipe soap on the hulls of our hydros before a race. That was many years ago. It wouldn't last and when the speed began to decrease we knew that was the end of our racing advantage. |
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Tug
Joined: 22 Jun 2007 Posts: 995 City/Region: Sault Ste. Marie
State or Province: ON
C-Dory Year: 1985
C-Dory Model: 22 Angler
Vessel Name: Drifter
Photos: Drifter
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Posted: Thu Oct 06, 2011 8:50 am Post subject: |
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Today i think i will reposition my mounting board and transducer to the Starboard side of the transom,is there an easy way to determine the angle of the transom, i am not reading my downrigger cannon balls so an adjustment shim may be necessary. If i remember correctly i used 5200 sealant to attach the mounting board, will the board come off the hull now. My biggest concern is about those long screws that came with the Airmar P66, they go right thru the mounting board and into the hull and because of this it is hard to seal them the way i would prefer to do. Any suggestions. Thanks Tug |
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