Herreshoff Double Paddle Concave Shaping

 14 Jan 22:

Lacking a concave spokeshave, compass plane or concave draw knife, I turned to the Skill belt sander with a 40 grit belt to even out the blade faces I also to cut a small channel down the middle of the face of the blade and carved a spine along the back. L Francis Herreshoff purports that the concave face plus some concave shaping side to side helps keep the paddle from fluttering and to scoop more water during the stroke.

The shaft was 8 sided with a Stanley #51 spokeshave, and tapered towards each end on 2 sides from 1 14 inch down to 7/8th inches. The shaft is oval for better grip.

Some sawdust for Doug and Richard. who always complain about our shop being too clean and organized.

1963 Alcort Sunfish CHIP 10 Apr 19 Scarfs and Keel Strips

10 Apr 19:

Worked on the bottom panels and keel strip for CHIP. For an 8:1 scarf on 1/4 inch plywood mark a 2 inch scarf line (8 x .25 = 2). The end of the panel is then planed to a slope, with a feather edge on the end up to full thickness at the 2 inch line. And since we want this stern panel scarf to fit underneath the bow panel scarf, we cut the scarf on the top face of the panel as we look at it. For the bow panel, we cut the scarf on the underside face.

120 grit belt on a Black and Decker belt sander a Stanley #5 jack plane to cut the scarfs into the 4 bottom panels. We lined them up on the 2 inch marks and cut the slope, looking for the ply glue lines as we shaved wood away. The goal is to get them as evenly spaced as possible, with the big picture being that the panels are being glued together. and no one will see that part while you are hiking out.

Cut 3/4 inch bottom panel centering strips from pine on the Ryobi table saw. They are sized to fit in the center notch on the keel strip centering jig. The weathered piece above the calipers is the old keel strip, used as a guide to find measurements for the centering strips and new keel strips. The strips are in two pieces, one to fit ahead of the daggerboard and one behind, and that means they can also be cut from an 8 foot piece of lumber. In ohter news Push Stick v1.0 is holding up pretty well.

Attached centering strips temporarily with #10 silicone bronze screws, drilled the pilot hole with a Fuller combination pilot hole and countersink bit. Those bits are tapered and work well for the softer silicone bronze screws, the same ones we'll use to permanently attach the keel strip. Bottom panels will be fit, glued and nailed, then centering strips come out and permanent keel strips wit overlapping edge attached. And the Kobalt drill and impact driver have held up well, we especially like the impact driver to put these screws in. Battery life has been great for our projects.

Attached centering strips temporarily, panels will be fit, glued and nailed, then centering strips come out and permanent keel strips wit overlapping edge attached. Keel strip is on the left, you can barely make out the T shape where the strip will nestle between and overlap the panels.

Log of CHIP.