NASA Clipper transducer

Installation of instruments and electrics in the Cape Cutter 19

Postby popeye » Sat Oct 09, 2010 8:56 pm

Hi David,

could you please supply a picture where your tranducer is fixed exactly?
Always fair winds and following seas

CC106 "Katrina"
popeye
CC19 Association Member
 
Posts: 50
Joined: Tue Sep 29, 2009 5:02 pm
Location: Bavaria, Germany

NASA clipper transducer

Postby David Peck » Sun Oct 10, 2010 7:47 pm

Hi Dennis,

My NASA echo sounder experienced considerable electrical pick up from my engine’s 12V charging system (Tohatsu 5hp with sail drive and the optional charging system fitted). Eventually this was cured but by then I had already fitted the transducer in the bows. This I considered to be the best place for slowly nudging into/over sand banks and also because I intended to fit an inboard engine. The prop shaft would prevent easy access to it in the skeg.

I did get a lot of water in my skeg but this was solely due to rain water from the leaking sliding hatch and skylight window which have now been cured. You are of course correct in contending that water collection, under normal circumstances, should not be an issue in locating it in the skeg.

Regarding progress of the inboard installation, this unfortunately stopped for a while due to other commitments but I have just restarted work on it. I have made the moulding for the engine hatch cover and I am currently half way through making the pattern (plug) for the hatch cover lid. It’s surprising how much work there is in making something simple like a lid moulding, especially incorporating the diamond non-slip surface pattern! I will certainly keep you all updated with the progress. I now hope to conduct the trials just before Christmas (hopefully not going backwards towards Christmas – private joke for David H)

Regards

David Peck
CC94 Whistling Rufus
David Peck
CC19 Association Member
 
Posts: 107
Joined: Tue Apr 07, 2009 6:50 pm

Postby David Peck » Sun Oct 10, 2010 7:50 pm

popeye wrote:Hi David,

could you please supply a picture where your tranducer is fixed exactly?


Frank,

I will email you some photos in a couple of days.

Regards
David Peck
CC19 Whistling Rufus
David Peck
CC19 Association Member
 
Posts: 107
Joined: Tue Apr 07, 2009 6:50 pm

Postby Dennis » Sun Oct 10, 2010 9:27 pm

Hello David

It is good to hear from you.

It sounds as if you have been unlucky with the electrical interference, but it is good to hear that you found a solution.

My dry bilge is probably in no small way due to the fact my boat has a spray hood fitted. I just do not get any leakage when the boat is on it's mooring. Because it is a swinging mooring, the boat is alway head to the wind. The sliding hatch only ever gets wet when I am sailing (with the sprayhood down).

I assume that you will get some leakage into the skeg through the prop shaft gland. Are you intending to fit an automatic electric bilge pump?

You are quite correct in stating that having the transducer forward is the ideal position for nudging over steeply shelving obstructions. I suppose you just have to weigh the advantages of that position against the ease of wiring when the transucer is positioned aft.

Best of luck with the Christmas sea trials. Your boat may be the first CapeCutter ice-breaker:rolleyes:. The inboard diesel should certainly help with that.

I am off sailing tomorrow, trying to get as much sailing in as possible before the boat comes out of the water at the end of this month.

Regards

Dennis

CC19 #100 Mary Ann
User avatar
Dennis
CC19 Association Member
 
Posts: 1007
Joined: Fri Mar 27, 2009 6:29 pm
Location: Northumberland

Postby Dennis » Sun Oct 10, 2010 9:30 pm

Hello Michiel

I have sent you a PM.

Cheers

Dennis
User avatar
Dennis
CC19 Association Member
 
Posts: 1007
Joined: Fri Mar 27, 2009 6:29 pm
Location: Northumberland

Previous

Return to Instruments and Electrics

Who is online

Users browsing this forum: No registered users and 1 guest

cron