Re: Build a Swing Keel from Scratch - ''74 Helsen 20'' Sloop
I used a belt sander with coarse grit to remove part of the end of the centerboard. You might wonder how I knew which side to sand since the lead weight is not centered. Basically, I sanded on the side where it was cracked.
You can see that the original embedded stainless strap was too thin. It bent like a pretzel under load from the winch.
The dark gray is regular fiberglass. The light gray is nothing but polyester resin.
They used stainless steel screws to attach the strap to the lead weighting before it was covered.
You can tell that it is lead because I can easily scratch it with my fingernail.
This hard attachment point will have to be replaced with something sturdier. What you can't see here is how the end of the centerboard cracked due to stresses from the strap. This apparently happened both because the flexible strap allowed forces to concentrate at the tip and because the fiberglass was not thick enough. For example, I don't believe that any polyester filler should have been used within the span of the strap.
Last edited by brehm62; 04-26-2012 at 12:25 AM.