Saturday, February 5, 2022

Nutshell Pram EXCUSE ME Forekeel and Frame Jigs and Laminations

 28 Jan 22:

The plans call for a forekeel and a midships frame to be shaped out of thin strips of wood, laminated together with adhesive. In order to do that we first needed to make a bending jig to hold the wood and adhesive to shape while the adhesive dries. We traced the pattern onto some scrap 1/2 inch thick plywood with a pen and carbon paper.



It is necessary to trace the full inside curve, but for the outside straight lines it is only necessary to mark the corners.


We measured the widest point of the finished piece to figure out how many laminations we would need. We came up with 2 inches, but SPOILER ALERT, we should have made the lamination about 2 1/4 inches as we ended up being about 1/16th inches shy on this corner, aka a knuckle. 


Here are the two bending jigs cut out


Some tools that we used, the drills were used as paperweights.


To make the strips we first cut a fir 2x4 to 1 inch wide. We also measured around the outside of the finished piece and added 4 inches to the length make sure we had plenty of material. 


Next we turned the one inch wide fir on its side and ran it through our DeWALT table saw, cutting 1/8th inch wide strips until we got about 2 inches worth of strips cut.


What we forgot to factor in is that these strips would be squeezed together with clamps, so 2 1/4 inches worth of loose strips would have been better.


Here are the longer strips for the midships frame and shorter strips for the forekeel.




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