July 17 Next up, the main topsail yard.
I prepared another fixture for soldering the inner and outer irons (right). This time I doubled up the setup. I didn’t like working with the second of each pair on a charred jig.
Then I got to work on the brass cylinders for the irons. Perhaps I’m overdoing it providing too much detail here, but I wanted to show how I set up reproducible machining steps.
First, I clamped the brass tubing into the Proxxon vise flush with the end. Then carefully located the drill to center the hole in what will be a 2mm wide band. Of course, the hole needed to be centered side to side as well (left). This was eyeballed.
To set up the cut to net me a 2mm thick cylinder, I positioned the cut-off tool flush with the end of the brass tube. Then I set the dial on the carriage wheel to zero and moved the carriage exactly 2mm to the left. This process produced virtually identical parts.
Here’s the first, hot off the assembly line
and the entire batch ready to be soldered
