Saturday, September 6, 2008

Wrap it up please:

The plans call for the keel to be wrapped with 1 continued layer of 12 oz biaxial fabric clamping at the trailing edge. You do this 5 times to complet the layup. I found this method to be very annoying, trying to keep one side tight while working on the other. What I ended up doing was to wrap one edge around the trailing edge and to the line of the 5 layers of tape applied earlier. This allows the fabric to be kept taught and does not effect the foil shape as the entire keel will be faired before painting. The other side is brought back to the trailing edge and left wet to hang by it’s own weight and will be trimmed once the epoxy begins to harden enough to prevent moving the fabric (about 1 ½ hours with the Marinepoxy medium hardener). The scantlings call for the trailing edge to be ground to a 30 degree angle as the final shaping/fairing is done so again the clamping at the trailing edge does not make a difference.

On my previous post there was no update for the time spent on the project. To get us back up to speed here are the new totals. This is as of today’s work including the last post.

Time: Glue up stock ½ hour
Square and plane stock to size 1 hour
Layout lines and cut kerfs ½ hour
Rough plane to shape 1 hour
Sand to final shape before fiberglass strips are added 1 hour
Lay in 5 layers biaxial tape as called (each side) ½ hour
Fairing – 2 layers (each side) ½ hour (does not include time for epoxy to dry before sanding)
Lay biaxial fabric 1 hour
Total this segment 7 hours Total Project 91 ½ hours