While working on the center spar I had needed to attach the doublers. The problem is that the body of the centerspar had  1/4 inch holes already drilled into them, but the doublers only had 3/32 starter holes. It is no problem drilling out the first hole to 1/4", but how do I make sure that I am centered as closely as possible  over the other other 1/4" hole.…

While setting the rivets for my spar jig I decided to take some infrared video of the rivet setting process to see

how the rivet heats up as it is compressed. Hopefully others find the results somewhat interesting.

The video can be seen at https://www.youtube.com/watch?v=_5s0YRXXiuw…

Just a note to be clear. This jig is only needed if you are scratchbuilding. The 650 kits are predrilled and the spacing will already be set.

The wing jig is needed to ensure that there is correct spacing between the center spar and the rear channel attachment to the fuselage. This would seem to be a rather important item to have around when scratch building a 650.

For some reason the wing spar jig drawing is not included in the current 650B plans.There are a…

I had to remake a few nose ribs and decided to use the opportunity to make a video demonstrating some of the techniques and tools I use for making ribs.

The video can be seen at https://www.youtube.com/watch?v=GOOy9W8IR_Y

 A few items demonstrated include

1. Use of a beverly shear for cutting sheet metal

2. Center punch use

3. Use of dowel pins for aligning…