Primed W-423 joint plate and inbrd leading edge rib.
Started the Lt. fuel tank, and this is were I deviated from the plans
and went with Dan's method.
Start with the drilling of the (6ea.) Z brackets ( don't do anything
with the inbrd most bracket yet) by drawing a centerline down the middle
of both flanges. Find the center of one flange on each bracket and drill a
#10 hole. Using a nut plate jig drill the nut plate attach holes to #40. Countersink
the attach holes and install a nutplate on the center of each Z bracket.
Attach each bracket to the spar and drill the remaining nut plate holes using
the spar as a guide. Mark your Z brackets, and remove them from the spar.
Install the other two nut plates on each bracket and temp install the bracket
to the spar. Warning: Do not drill any holes on the top of
the Z brackets yet. See picture.
Temp install the leading edge, W-423 joint plate and fuel tank as
well as the inbrd most Z bracket. Final drill the joint plate.
Drill a # 10 hole on the bottom of the inner most Z bracket
and temp install it. Final drill # 30 (this Z bracket only). If you don't
have a angle drill try my die grinder with tape around a long drill bit
and finger tight method. It works perfectly. Remove the leading edge and
final drill the outbrd most Z bracket.
Remove the tank and final drill the baffle to the remaining 5 Z
brackets. Remove the baffle and install the inbrd nut plates.
Final drill tank ribs, baffle # 40, and tank attach holes to # 19.
Machine countersunk tank skin to baffle. Do not countersink the baffle.