Scarfing bulkheads

Not enough wide and long row material you need. We need to glue the pieces into each other.
Before gluing I had to prepare the surfaces to be glued.
Scarfing using electric plan, belt sander.

bulkheads are scarfed




Longitudinal structure of the boat

The stringers are made of Sapelle Mahagoni wood.

Stringers must be milled before placing and gluing them into the bulkhead holes. Rounded edges decrease the tension in the corner of the bulkhead holes.



Almost all the bulkheads are cut. I have to wait for warmer weather. We have been spoken with a chemical engineer of Alvin-Plast (distributor) and he suggested not to used the epoxy glue below 20 degrees (Celsius) [68 Fahrenheit]. In addition to the weather was too rainy last week and the same humidity condition will be expected for this week as well.

Bulkheads are waiting for gluing

Cutting bulkheads

Building is starting with cutting the bulkheads. I have no pre-cut patterns contain the 1:1 scale drawings of bulkheads. I have only the plywood row material and the drawings plotted in size 1:1. I’ve created and plotted all full-sized drawings based on the bulkhead’s diagrams and the table of offsets with CAD by my own. Question is: how to copy the drawings from paper to the plywood? Hm. I use carbon paper to do this. The second question is: what the bulkheads will be cut with? With jigsaw. If you have shaky hands don’t try it. I’m skillful and enough fearless to try it. Another choice if you buy the original patterns or make CNC milling program manually or using CAM coordinate descriptions and apply an easier way to cut.

First bulkheads are cut

Paper drawing size 1:1 will be copied onto plywood

Using carbon paper to copy the drawings onto the plywood