Began drilling the F-772B floor stiffeners - 2 hours

A while ago, I had already cut and notched the center two stiffeners for the correct fit. Now it's time to install and drill the F-772B floor stiffeners. Before drilling, I test fit the F-782C center cabin cover since the holes do not appear that the sit at the center of the angle. In the end this is not a concern as the cover nests inside the angle very well.

 I began drilling a pilot hole at the center of the stiffener and worked outwards. I began to notice an inward bow as I cleco'd.


I also checked the bow in the side skin where the F-719 stiffeners are.

Yup, there is no doubt that the joggle (z-bend) in these angle parts result in the fit from needing a bit of attention. I do recall a time when I was talking with Vans tech support and they had recommended a small shim in these areas. I am going to ask the question to the build group on-line and see what others have done to smooth these out.

I have posed the question on-line but have not got a whole lot of responses. A couple of people say that it will be fine once riveted, and one suggested cutting the joggle off and riveting on an offset extension with shims. Nobody mentioned shims as Van's indicated. I don't know what I am going to do with this just yet