[C320-list] Knot meter

[jim brown]

I think there are speed transducers that use ultrasound rather that a paddle wheel so maybe somebody replaced the paddle wheel . I know Garmin makes one but it is very pricey $1200 at WM. 

Jim Brown

      From: Allan S Field <allan.field at verizon.net>
 To: C320-List at Catalina320.com 
 Sent: Friday, May 1, 2015 8:52 AM
 Subject: Re: [C320-list] Knot meter
   
Denny - In the forward cabin, there should be a piece of the deck that lifts
up.  When you lift and remove that piece, you should see your knot meter
laying in the bilge - it's has a little paddle wheel on one end and wiring
on the other.  What you are seeing from the bottom of the boat is the
dummy-plug (it's probably call something else but you get the point) that is
used in place of the knot meter.  The yard very probably pulled the knot
meter before hauling so as not to damage it.  You will need to pull the
dummy plug and then inset the knot meter plug, paddle wheel down, and all
should be OK.

Allan S. Field
Sea Shadow - #808
Columbia, MD



-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
Of Denny Browne
Sent: Thursday, April 30, 2015 10:38 PM
To: C320-List at Catalina320.com
Subject: [C320-list] Knot meter

I feel dumb. Knot meter hasn't worked since the last bottom job. I thought
the yard guys bent the little paddle wheel with the sling, but I just hauled
it again and there isn't a little paddle wheel. There's just this little
round lens in the middle of the through hull, flush with it. Same for the
depth sounder, which seems to work fine. 

Anyone want to venture a guess as to why the knot meter might just quit? How
does the gizmo in the hull know how fast you're moving through the water?

Any insights, no matter how obvious, are appreciated. 

Denny Browne
A Cappella #935
Redondo Beach

Sent from iPhone, sorry for typos, grammar, etc...