[J22-Fleet 1] Waterline

[Pat Kabris]

Just a couple more notes on fairing -- in the absence of templates --

       1. If you wish to shape to be at minimum thickness -- the  
templates that the Fleet has will help you determine how far to take  
it down to get to minimum.

       2. Place ten marks equally spaced, across the top of the keel,  
near the chord and ten equally spaced near the bottom, along the  
chord of the keel.

       3. Use a straight edge, vertically between the top and bottom  
marks at each location.

       4. Sand and fill until all lines are straight.

       5. Use your imagination on the radius shape on the leading  
edge. Some will say it should be full, others will say skinny.

       Cheers,
       Pat K


On Mar 7, 2007, at 11:35 AM, Michael Bowers wrote:

> Do you mean exposed fiberglass?  Gelcoat should be fine, you've just
> got to wash it once in a while.  Assuming you'll be keeping your boat
> on a lift, I'd rather have the gelcoat then bottom paint.  Chalky
> anti-fouling paint is fairly rough and the smoother teflon impregnated
> paints don't stick very well and often start peeling after a season or
> two.  Roger Carlson--chime in here.
>
> As to checking shapes, I think you'll find that most of the J22's are
> down in Glencoe in a barn.  I don't have the full details of
> where...you'd have to check with Dave Brasch or someone that tows  
> their
> boat there.  I would imagine that if you call a few of the boat  
> owners,
> they'll give you permission to go take some measurements of their
> boats.
>
> My final 2 cents, shaping a keel is more of an art than a science.  It
> is critical to get the 2 sides symetric or you'll get nasty vortices
> off the keel that will disrupt the rudder.  I'm very much a "do it
> yourselfer", but shaping the keel is something I'd hire out to a  
> select
> few people (Fred Scroth from TX or John Pratt in MA to name a
> couple)rather do myself.
>
> Mike
> --- Dallas <dallas at dallasjohnson.net> wrote:
>
>>
>> Compu-keel templates are copywritten, you're not supposed to loan
>> them
>> out or resell them.
>>
>>
>> Chis Doyle (class prez, I think) once said he was going to make a
>> plot
>> of the class minimum shape, but I don't know what happened to that.
>> Compu-keel is effectively the same as the class minimum shape.
>>
>>
>> dj
>>
>>
>> -----Original message-----
>> From: "Jacob Bowman" jakebowman at gmail.com
>> Date: Tue, 06 Mar 2007 15:41:10 -0600
>> To: j22 at lists.wyc.org
>> Subject: [J22-Fleet 1] Waterline
>>
>>> Sorry for being a pest. I've got to add some sort of finish on the
>> bottom
>>> of my boat as it is bare gelcoat right now. Is there someplace on
>> the web
>>> that has some measurements of where I should put the waterline? Or
>> would
>>> one of you guys be willing to make a few measurements for me? Or is
>> one of
>>> your boats laying around somewhere that I could swing by and take a
>> few
>>> measurements?
>>>
>>> Also, I haven't been able to find a set of keel templates. The set
>> that
>>> Lars has aren't really for shaping a keel, they are more for
>> establishing
>>> maximum/minimums. So if anyone has a set of the templates and they
>> would be
>>> willing to let me borrow or copy them I'd be eternally grateful.
>>>
>>> Thanks a ton,
>>> Jacob Bowman
>>>
>>>
>>> _______________________________________________
>> J22 mailing list
>> J22 at lists.wyc.org
>> http://lists.wyc.org/mailman/listinfo/j22
>
>
>
>
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