Knot Meter Impeller

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Walker Brown
Posts: 16
Joined: Apr 8th, '07, 20:20
Location: CD27
Godspeed
Ocean Gate, NJ

Knot Meter Impeller

Post by Walker Brown »

1978 CD 27

I have a perfectly good VDO Sumlog, mechanical knot meter, unfortunately the impeller (paddle wheel) is broken. A replacement part is no longer manufactured by VDO and multiple distributors state they no longer carry this vital part. If anyone has an impeller amongst the pile of old unused parts we all save, I would be more then willing to pay for the part including shipping cost to Philadelphia.
Looking forward to a positive response.

W. Brown
215 922 2021
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Warren Kaplan
Posts: 1147
Joined: Feb 5th, '05, 11:44
Location: Former owner of Sine Qua Non CD27 #166 1980 Oyster Bay Harbor, NY Member # 317

Post by Warren Kaplan »

The little paddle wheel on my knotmeter used to get fouled every year even with various types of antifouling or transducer paint. It finally broke one year and I decided not to replace it again because the speed over ground, what I am primarily interested in, I read right off the GPS. I haven't missed my knotmeter in years.

I know this doesn't help you out here, but in my estimation the loss of the knotmeter, for speed concerns anyway, isn't missed because gps does it better. Speed through the water is another thing but I can't remember when I needed that, especially if you are aware of which way the tide is running in relation to the direction of your boat.

For what its worth. :)
"I desire no more delight, than to be under sail and gone tonight."
(W. Shakespeare, Merchant of Venice)
marilou
Posts: 213
Joined: Jan 17th, '06, 10:29
Location: CD 270/Virginia

Post by marilou »

You might check this out. http://www.furneauxriddall.com/shop/aca ... heels.html The VDO Sumlog is an excellent unit. If you come up with solutions let me know. I have one also.
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Ray Garcia
Posts: 258
Joined: Apr 27th, '05, 22:08
Location: 1981 CD27 #212 "Spirit" Huntington, NY
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Post by Ray Garcia »

In my rush to launch I forgot to paint the paddle wheel last season. Towards the end of the season the knotmeter ceased to work. Obviously the paddle became a sort of cruise ship marine colony as I sailed them around the sound.

I remember someone telling me after removing the paddle, soak it in white vinegar for a few days and it will come out good as new. After a few days it looked like I never installed it. I also soaked the stainless steel nut that holds on the prop zinc. Wow did it come out clean.
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