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Old 21-03-2018, 06:06   #1
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Join Date: Mar 2018
Location: Panacea, Fl
Boat: Gemini 3200 32 ft
Posts: 2
Centerboards for Gemini 3200

Attention on Deck.
I have am Gemini 3200 and worms have gotten to the centerboards.
I am building new ones and need to know if they are symmetrical or asymmetrical. My current boards are distorted due to swelling. And the 3200 boards are different from the MC105s.
Thanks for any help out there.

TwoCan360 is offline   Reply With Quote
Old 19-05-2018, 20:09   #2
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Join Date: Dec 2007
Location: Duluth,Minnesota
Boat: Lindenberg 26 & Aloha 8.2
Posts: 1,279
Re: Centerboards for Gemini 3200

A bit late I'm sure but the 3000, 3200, 3400 and early 105's had symmetrical boards. Much more sensible on a cruising cat. Assymetric boards only make sense on actively sailed boats such as racing boats.
clockwork orange is offline   Reply With Quote
Old 20-05-2018, 13:16   #3
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Join Date: Aug 2009
Location: Lake Macquarie NSW
Boat: Chamberlin 11.6 catamaran
Posts: 727
Re: Centerboards for Gemini 3200

As Clockwork says, cruising boats can't really use assymetric boards. You have to retract the windward one by pulling it up after every tack like the AC45 cats did. So your boards should be symmetrical, even if they were designed to be assymetric for some strange reason.

My two cents - get your diving gear on, our with the boat on the hard, really check for the minimum width of the case. I have had issues with building boards 1 or 2 mm wider than they should have been. It can be very hard after you add some filler to smooth out the weave and then paint the thing. It is always easier to build the boards first and then the cases. So err on the side of caution and leave 5mm at least for glass, filler and paint.

I don't like using ply for boards as half the grain runs in the wrong direction. If you can get ply with only one orientation of veneer, it is called bendy ply in Aust, then that is okay, but I like cedar better.


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centerboard, gemini

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