RE: Building the BUSA SPAD 13
Hi Guys, I have been working off & on on the SPAD. The holidays are hard to get anything accomplished, you just work when you get a free moment. I finished the tail-skid mount, it looked a little weak so I added some aircraft plywood and insert a brass tube. The brass tube strengthens the hole. Also, I replaced couple stringer that were soft balsa and added 1/32 ply to strengthen the glue joints. I used a string from the tail post to line up the wing. This model sets the wing incidence different than others I have built. BUSA recommends using an angle finder to establish the incidence of the bottom wing. With every thing set and lined up I drilled the wing bolt holes and installed the dowel rods that hold the wing in place. I like to reinforce the bolt holes with fiberglass tubes (Dave Brown push-rods). I drill out the holes one at a time, line up the tube glue the tube in with epoxy, install the bolt before the epoxy sets up. Then do the other bolt hole after the epoxy sets up. Here are the pictures