Got a couple of free hours today to work on the boat - Yee hah.
Spent the time bevelling the sheers notches to suit the curve of the sheer. I have got it very close to right. I bit of fine tuning with a rasp should see it finished. Then I get to do it all again on the other side.
Couple of things I have observed.
1. As everybody says....the forces on the frames are quite severe, with the sheer only on one side it pushes the frames sideways by probably 1/4 an inch. It wants to push further but the extra bracing I put in has stopped that. I will definitely get the other side notched out and the sheer clamped in place before glueing this side to try and keep the forces balanced.
2. I had one notch that seemed oddly out. I studied it for a while then decided I need to cut more out. At the time I had the sheer clamped into the notch on the frame either side. But the sheer past there was only loosely held in the remaining frames. Well I removed the sheer, but it didn't feel right so I put the sheer back on, but clamped it at all frames, and to my surprise, the one I was going to cut now fitted perfectly. Moral of the story is with these long pieces of wood, they have to be sitting correctly all the way along. This is a bit tricky, as until you cut the bevel they are in the wrong place, but once you cut the bevels it affects the frames adjacent. You can chase your tail is your not careful.
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