nondem wrote:
The plane design I'm building uses 2x2x.125" 6061-T6 for the fuselage
frame. I did notice that older versions of the same plans specified
6063-T351.


I checked the specs on both and as I remember the 6061 is a stronger
alloy. There is almost no aluminum sheet used in this design
either...Just angles/square and round tubing for the most part.


That sounds a lot like one of the late Graham Lee's UL designs.

Close?

Richard