How thin trailing edges rudder/dagggerboard

On passage maker I am getting to a nice taper but how thin at the trailng edges should I go 1/8 inch etc???


6 replies:

« Previous Post       List of Posts       Next Post »

RE: How thin trailing edges rudder/dagggerboard

Yes, 1/8" or just a tad smaller is fine.  We're not building America's Cup boats here.  You'll appreciate the extra strength in the long run.  Also, I covered my blades with a few coats of graphite epoxy which thickens it up a bit.  Some people even glass theirs.

RE: How thin trailing edges rudder/dagggerboard

   Can you paint over the black grpahite epxoy cotaing or fo you leave it as is?

RE: How thin trailing edges rudder/dagggerboard

Actually, I would recommend a bit thicker than 1/8".  The template that came with my Goat Island Skiff plans actually has a 1/4" thick trailing edge.  As CS says, the trailing edge needs to have some strength.  That is the part of the board that will absorb the loads created by an accidental grounding.  

The more important thing is to NOT round over the trailing edge.  It needs to be cut flat/perpendicular (square) to the chord line of the C/B.  Rounding over will create significant drag.

If you coat with the epoxy/graphite slurry, no need to paint.  The GIS plans called for the boards to be glassed.  My plan is to paint them with the same paint that I will use on the bottom (Wetlander).  

  

RE: How thin trailing edges rudder/dagggerboard

   Really, I would prescribe somewhat thicker than 1/8". The format that accompanied my Goat Island Skiff arranges really has a 1/4" thick trailing edge. As CS says, the trailing edge needs some quality. Groovyessays.co.uk That is the piece of the board that will assimilate the heaps made by a coincidental establishing. Really, I would suggest somewhat thicker than 1/8". The layout that accompanied my Goat Island Skiff arranges really has a 1/4" thick trailing edge. As CS says, the trailing edge needs some quality. That is the piece of the board that will retain the heaps made by an incidental establishing.

RE: How thin trailing edges rudder/dagggerboard

No, you can't paint over epoxy graphite.  Evidently, the paint doesn't stick.  That's okay, I like the matte black color.

« Previous Post     List of Posts     Next Post »


Please login or register to post a reply.