Category: Wings

I started the layout of the main spar center web. To begin with I cleaned up the top and bottom edges with the vixen file and sanded until I had two straight edges that I could work from.

These were a bit fiddley(sp). I ripped a strip of aluminum to 1/2" then filed one edge flat and added the radius to the other long edge. Next I setup my fence in the bandsaw to 5/8" and cut out all of the blocks. Finally, I sanded the fresh cut edges. I think I have all of the 1/8" parts complete except for the inner spar webs.

I added the rad to the bottom edge of the doublers. I forgot these when I originally made the parts so I had to go back.

Marked and cut out both doublers on the bandsaw. I dilled a starter hole and used a copping saw to cut out the large hole in the doubler. Next I used a sanding drum in the drill to finish the hole. I filled and sanded the edges then marked and drilled the pilot holes.

I completed the bell crank plate. Layed it out, cut, filed and sanded it, then drilled the pilot holes

Drilled the holes and cleaned up with scotch brite.

Measured and marked the part out on the aluminum. Cut it out on the bandsaw then filed the part to finished size. Marked the holes for drilling.

I finished the attach plates today by drilling the 3/16 inch holes at the end of the plate and then sanding and scotch briteing the parts.

For the oval hole in the other attach plate I decided to drill a single hole and then cut the entire oval using a coping saw. This seemed to work quite well. I did some sanding with the drum sander. When I overlayed the parts I discovered that the two ovals were not the same size. After some measuring I discovered that I had measure one of the holes wrong. I was too small. Whew! Making a hole bigger is easier than making it smaller. After marking the correct hole size is used a round file to open up the hole.

I finished sanding the large oval hole. Next I setup a fence on my drill press to allow me to drill all of the 3/32 inch pilot hole in a straight line. I clamped a piece of hardwood to the drill press table 1/4 of an inch from the centerline of the drill bit. This lets me drill exactly 1/4 inch from the edge of the part. All I have to do is line up each of the marks measured from the end of the attache plate.