This took a couple of weeks. I set the floor measurements out again and moved the workbench and a few things to make room. It got pretty interesting having to step over the soft wing core for a while knowing if I slipped it was a lot of repair work.

This time I had to be super accurate in my setting up to assess if the right wing was OK or if FC1 had to be cut off this one too. I used the Archimedes water level with some red dye. Next time no dye… it stains the floor when you spill it. Who knew? I first had to get the spar exactly level which was a job for the digital level and a lot of time. Once that was good another check was the water level at both ends of the spar. That’s where the action is after all. It was .01 degrees different to the center which is almost in the noise so my spar is …level. Then I nailed it to the floor! Yes bondo to the bench and a few screws and things as in pic 3. So now I have a datum that is the top of the spar, not the floor.

The spar goes in the fuselage at W.L. 22 and there is a mark at W.L. 17.4 on the template wing roots. So 4.6″ down from the spar top and level is where the wing root line needs to be. The W.L. 17.4 at the outboard end of the wing and all the other bits lined up on the floor at the correct places. Last time I made a mistake with where the wing end WL was. There are two lines on the template. An inch out there added seriously to the problem!

Another issue is setting up the wing with no bow and thats what the straight edge was for as you see in pic1. Take the bow out and the wing goes down at the end moving the water line. So it need to be straight.

It turns out that the spar thickness and the projected wing thickness are almost identical! I thought the spar was going to be a bit thinner. This means there is zero room to have the FC1 angle wrong. The penalty is a LOT of filler on the wing or spar and incorrect angles per the designer. Yes there is a bit of wiggle room here given people have build odd things over the years. I’m going for Burt’s idea of a straight plane.

Ensuring no bow

Water level

Spar nailed to the floor and bench