Wing measurements

Placed the laser under the aft fuselage. Then it will reach all corners. Then I measured the height from the point of measure down to the level laser light. For the tip leading edge I used a rod the fitted into the little hole in the ribs. Found out it was completely impossible to eyeball the leading edge. For the mid point leading edge there is a small hole in the skin. At the trailing edge I just measured from the bottom.

The idea is that when difference H1 - H2 is the same for all cross sections, then the wing is straight. I needed to rise the right mid trailing edge about 7 mm, then everything will be straight. Now I can drill the mid skin in place, with the outer sections on (at least some of the holes), and the wing will be straight.

   

Measuring wings and aft pin

I tried to measure if the wings were straight, and got a little shocked when I found that they were twisted. I measured from the wings to the floor. Then I thought, just maybe, the floor isn't all that straight (When it was made I knew it wasn't completely straight, but...)

Borrowed a leveling laser from the lab, and rigged it up with the aircraft. The laser was in front of the aircraft and the light was directed to the wing tips, and any other point I liked to check. The wings are straight as can be. At least as straight as it is possible to measure with that laser. Phuuu :-)  (I still have to measure the trailing edge to be really sure it is straight, but I think it is. When measuring from the floor, it was the leading edges that were off.)

Then drilled and reamed the right aft pin hole. The pin shaft needed to be bent a little to let it go easily in and out.