Front Spar

Now that the ribs are complete, they are set aside and I have spent my time on the front spar.

As I am doing this for the first time, I had to decide how to bevel the top and bottom of the spars to 10 degrees. Table Saw, Circular Saw or Trimmer?? Answer, Trimmer. Perhaps slower but more accurate.

The first picture is the first round of trimming for the cutout for the steel attach bracket. Top and bottom sides are bevelled to 10 degrees. Second picture shows how I used the untrimmed rear spar to be the guide for the trimmer. Third pic, ply doublers completed and trimmed to 10 degrees top and bottom.

I had plenty of trouble glueing the doublers to the spar. They are big surfaces and the T88 would move between the spar and doublers which meant they kept moving. I tried clamping them in the spar racks, but that didn’t work. Flat on the table was better but still they moved. In the end I clamped each side to hold them with weight applied on top to hold them onto the face of the spar. It was a bit of pain. But they are done now. Well drying anyway. Next task a finish sand and filing of all the faces to make them perfect.

Oh BTW the steel brackets dont have the sway wire and stagger wire attaches welded to them yet. Figured it would be easier to drill the spars without them. They are made and will get welded later.