: Build Log
Late War PT Boat
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Aug 01, 2012
, 06:51 PM
United States, TX, La Porte
Joined Apr 2007
I spent this last weekend cleaning up my old pen turning lathe. As near as I can tell I have not used it since 1995. Back in the day though I turned a lot of wooden pens with it.
I went on line and found a government manual on the Mark XIII. It was written in 1942 and contains all the drawings and technical information you could want concerning this torpedo. What I found out was that I was wrong in what I thought I knew. Turns out there is only one section of the torpedo, which is called the air flask which is the same diameter at either end. The war head tapers very slightly from the air flask section forward. I also found out there is more detail on the surface of these torpedos than you might think. I'm not going to be able to duplicate all of it. I just want to make sure the overall shape is correct.
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Here she is all cleaned up. Don't laugh, it works. I don't know what I would do if that belt ever broke.
I bought an expandable four jaw chuck so that I could work on the PVC sections. It's a cool little chuck.
The diameter of the PVC was slightly larger than the cast piece from MBH but this worked out for the best. As I said, the war head body has a very slight taper and I just reduced the PVC to meet the cast piece.
The air flask section on the left and the tapered war head section on the right. Next I will turn the tail section of the torpedo out of a piece of bass wood making sure the diameter at both ends is correct.