I started on the 175 projo this morning. I am going to duplicate my M-437. Hopefully, I will install a real M-577 fuze. I am using what we in this area call “Sugar Maple”. It is not a hard Maple, but it does paint well. I am not going to paint it, but I understand it will be painted. My job is to make it so pretty that no one would want to paint it.
My projo has been de-milled and does not have the rotating band. I have replaced it with a piece of PVC pipe. It is not the best, but I think it looks better than nothing. If anyone has photos of an actual rotating band, I would appreciate it – tough time finding a photo on the net.
The first step was to make a CAD drawing of the projo. This will make it easier to determine correct measurements without scratching the paint with my calipers. Before I go any further I should say right up front. This is not being built to “machinist” standards. I have a metal lathe. I will be using my woodworking lathe. I am a woodworker with a metal lathe. I am not a machinist. Plus it is wood. The humidity will move the wood in measurements greater than machinist’s standards. My goal is to try and stay within 1/16th of an inch.
Stave construction means it is not solid wood. This must be shipped to California and weight is important. Wood costs money, so why use more than necessary? I use my “Bird’s mouth” router bit and use twelve staves in the circle. I will have to make three separate parts. The center section is a cylinder and both the top and bottom sections will need to be tapered. Most likely, I will use some type of tenon to hold the sections together. It will not come apart, when I am done. I had to do some calculating to get the proper taper. Not bad for one day’s work.