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Daggerboards and rudders for Alpha Omega #225415
12/14/10 05:12 AM
12/14/10 05:12 AM
Joined: Dec 2010
Posts: 1
O
omegaman Offline OP
stranger
omegaman  Offline OP
stranger
O
Joined: Dec 2010
Posts: 1
Ok, - yeah yeah, I know seasons already started, but new baby has delayed getting the other baby out of the carport. The other baby is a Alpha Omega 4.3 with the big (13.5 m2) cat rig.

My problem is this:

The previous owner was a recreational shallow lake sailer and has replaced the original boards with a lovely looking('glass over cedar and ash), but somewhat useless(for an AO) set of boards from a Paper Tiger - (hull depth at slots is much greater on the AO compared to a PT). Also - the rudders have been replaced by what looks like a set of shortened Hobie14 rudders (blunt, heavy and short).

The ensuing result is a cat that doesn't point very well, generally handles like crap, and is rather difficult to tack.

I have aquired LxW specs of the original boards and rudders but not profiles or shapes. I'm thinking NACA 00012 and 00010 profiles will be somewhere close, but not sure. Also, I have no idea what shapes would be best suited for each.

I can competently home-build in cedar and carbon(or kevlar/aramid) so construction is not a problem, but resources on the net in terms of modern fin shapes for cats are virtually non-existent.

Can anyone offer wisdom/plans/links/opinions or anything else that will help??? I aim to make them in the Chrissie break.



Many Thanks



btw: a lovely set of glass over cedar and ash dagger boards for a Paper Tiger will be on offer soon as new boards are completed!

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Re: Daggerboards and rudders for Alpha Omega [Re: omegaman] #225416
12/14/10 05:26 AM
12/14/10 05:26 AM

S
Scarecrow
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Scarecrow
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Last edited by Scarecrow; 12/14/10 05:28 AM.
Re: Daggerboards and rudders for Alpha Omega [Re: omegaman] #225451
12/14/10 10:08 PM
12/14/10 10:08 PM
Joined: Feb 2004
Posts: 1,012
South Australia
Darryl_Barrett Offline
old hand
Darryl_Barrett  Offline
old hand
Joined: Feb 2004
Posts: 1,012
South Australia
WE still have the moulds for all the AO rudders and centre boards and will lay them up on order.
phone us on (08) 8326 0877 if your interested
Darryl


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