Monday, January 18th, 2016

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Subject: the Mark IV centreboard and the CB brake - updated and now complete
From: Mike Duncan 
Sent: Thursday, August 06, 2015 1:19 PM
Subject: Mark IV centerboard

Hi Al,

I had a problem with my centerboard, the screws that held the rubber hose that acts as a brake on the centerboard pulled out. As a result I had to removed the board to do a proper repair.

I found it was quite difficult to find out just what the board looked like and so I thought that once I had it out the enclosed photo might help others who had to remove one of the Mark IV boards.

 

Maybe the photo could find a place in the Wayfarer Institute.

 

Mike  Duncan W10962



From: Mike Duncan
Sent: Wednesday, January 06, 2016 11:13 AM

 

Hi Al,

In the fall I sent you a photo of the MK4 centerboard  hoping that you would put it onto the web site so that it would help anyone who had to remove their board  That photo was of my board the way it came from Hartley.  I misplaced that photo but I have enclosed another photo of the my board.  It  still shows the pin so that anyone can see how to get the board in and out of the boat, however this photo also shows the small metal plates I attached that take machine screws in place of the wood screws that came from Hartley.  The wooden screws seemed really easy to strip and they were showing signs of being wet and subject to failure.  My original problem was that the wood screws that hold the rubber hose to act as the brake on the centerboard did pull out and I also replaced them with machine screws and metal inserts.

If you have the original photo I think that would be better to show the board the way it came but the later photo is here if you need it.

Mike
W10962







From: Al Schonborn [mailto:uncle-al3854@cogeco.ca]
Sent: Sunday, January 10, 2016 7:11 PM
Subject: the centreboard brake

In case you didn't see it in my book, here's how I addressed the brake problem:

 

The whole thing hits tomorrow's Weekly Whiffle and then the WIT. See you at the AGM?

Best regards,

Uncle Al  W3854



From: Mike Duncan
Sent: Sunday, January 10, 2016 7:40 PM
Subject: the centreboard brake


Hi Al,

Yes my board in the CL16 looked just like yours.  I think you could do the same thing by putting the lower plate with the threaded holes directly below the rubber hose and screwing it to the board.  You would have to drill larger holes below the threaded holes to make room for the bolts and then line the holes with epoxy.  This would eliminate the cutout in the board.

In the MK1V boards the big advantage is the centerboard pin that is permanently installed and cannot leak.  It means that you have to crawl under the boat to remove the two screws and that plate, that hold the board in the boat, so that the board can be pulled out from the top.

Mike Duncan W10962


On 2016-01-10 8:21 PM, Al Schonborn wrote:
Hey, Mike: I don't see how the threaded aluminum strip as part of the first cut-out would effectively hold the whole apparatus in?


From: Mike Duncan 
Sent: Tuesday, January 12, 2016 12:20 PM

 

Hi Al,

 

just got around to attaching a diagram for the no cutout CB brake.

 

I hope not too complex but the parts are all the same just arranged in a different order and 3 new wood screws are needed to hold the brake unit to the board.

 

Mike




larger image here



From: Al Schonborn [mailto:uncle-al3854@cogeco.ca]
Sent: Tuesday, January 12, 2016 6:29 PM
 
Aha! Yes. I see. The three wood screws were what I had not pictured. Very nice. Thanks for the explanation. Will start next Monday's Weekly Whiffle with the complete version which will also go into the WIT in a few minutes. Will let you know.
 
Best regards,
 
Uncle Al  W3854
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