Brief Description: Leveled dihedral, sweep and triangulation
Some more photos belatedly uploaded. Work hours unknown, but there were a few the weekend of 26-27 August for sure.
Rechecked fore & aft and lateral level (including spar carry through and seat back rest): still dead nuts 0,0 degrees on the electronic level.
Checked dihedral angle of each wing. Level aligned with main spar at 3 locations each wing; measurements (degrees of positive dihedral) were: LEFT 3.6(1), RIGHT 3.5(1). (Parenthetical digit is estimated s.d. of the mean in the last digit).
Checked left and right wing tip to center fuselage distance with a tape measure: LEFT 196-15/32", RIGHT 196-1/2"
Bought 4 brand new plumb bobs to hang over the wing leading edges. Wasn't comfortable with the cheesy marks on the floor. Image 1 shows a taut horizontal line (stretched between two jackstands) just kissing all four plumb bob lines.
Images 2 and 3 show the drill bushing fixture I made to get rear spar edge distances right. Cut off one side of a "pincer" vise grip and welded a 1-1/8" dia cylider of mild steel to it. The cylinder was concentrically bored and lapped for a tight slip fit of a locking ring for removable 1/2" OD x 1/2" long drill bushings. Images 2 and 3 show the drill bushing tool locked in place, with a block of wood on the other side to drill into. As long as the edges of the rear spar stub and rear spar carry-thru "ears" are visible around the cylinde edge, drilled holes are _guaranteed_ > 5/8" edge distance.
