CENTERBOARD DRAMA CONTINUED_------------

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10 years 1 month ago - 10 years 1 month ago #1764 by George Myers
. Anyway -new centerboard looks great. .
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Last edit: 10 years 1 month ago by George Myers. Reason: personal observations removed

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10 years 1 month ago #1765 by Gerry O'Donoghue
Hi George

Wow, interesting. Can you post some photos of the trunk.

Gerry

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10 years 1 month ago #1766 by George Myers
Actually kind of a false alarm-The liner was removed and stored away from boat- the good news is we have the liner (which they call a "shoe" It is partially damaged but can be repaired -maybe added to.. However it is only 6 inches high and in no way can it brace the board at the head end. The large cavity also was home to a oyster bed above the shoe and made it impossible to remove the oysters above the shoe. So we are meeting Thursday morning to see what can be done to get an excellent installation that can be maintained . In for a dime -in for a dollar

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10 years 1 month ago #1767 by George Myers
By the way- the 'board is not a true foil-The thickness stays the same as the width decreases--its just a fin -not a NACA foil.. Another way to go cheaper in production..........Then the way the down-turning block (it leaked around the haul pipe onto the diningroom table) was installed was also wrong. They Hallowed out the balsa from below in the area of the block and then just bolted with 6- #8 machine screws to only the thin top deck layer of FG. Of course the continuous pressure of holding and hauling the board cracked both the little teak pad under the block--and the trim teak below
hence an eternal leak on your dining table. Needless to say Im installing a new block and re-filling the balsa area with strong stuff. Wonder what next 'discovery' will be

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10 years 1 month ago - 10 years 1 month ago #1773 by George Myers
OK OK getting somewhere - The board is done -cost $4800-up from $4000 quote seems he 'forgot sales tax and some unspecified stuff-actualy he made a new pin with bushing...hes only game in town.(Tony). So I proceeded to accurately measure both the board and the cavity and the now available "shoe". Then Yeasterday finally met with Joe Pocklington . He was the general manager of FT Myers Yacht and Ship, the builder of boat 31 years ago. He confided that he noticed the boards thumping when he sailed on them. So we reviewed the measurements and found that the "shoe' was only 4.5 inched high ! the board, when stowed in the up position is only 2 3/8 thick at the 4 1/2 inch height/ The board at its thickest is 2 3/4 at 8 1/2 inches high all along the board. However at the 4 1/2 inch location we have 1/4 + 3/8 "slop"= 5/8 all along plus the surging water flows thru this gap . This is where the noise comes from when boat rolls with board up. SO what to do
what to do? We decided to extend the height of the "shoe' on both vertical legs by 8 inches which will make it 12 1/2 inches high with a clearance of 1/4 !! Then we will glue small 'spacers at the backside at the top of the shoe about every foot.
between the shoe back and wall of the cavity. This will keep the now tall shoe from flexing. Now the board will be trapped between the shoe walls with only 1/4 inch clearance up or down!!! If the builder had made the shoe tall originally no one would ever have had a problem with this centerboard. Live and learn. Stay Tuned.
Last edit: 10 years 1 month ago by George Myers. Reason: wrong photo

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10 years 1 month ago #1781 by George Myers
The Modified liner or "SHOE" is now completed and has been test fitted and it looks good. Teak strips 3/8 wide X 1inch high have been epoxy glued to the outside of the shoe sides - this takes up the difference and provides a net 3 inch opening for the 2 3/4 wide centerboard. The shoe is now 13 1/2 inches high vs the original 4 1/2 inches. several 3 in dia. holes were let into th esides to alleviate water pressure when board is down....(just guessing here) .
The following user(s) said Thank You: Gerry O'Donoghue

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