Rivetting of flap and aileron upper surfaces

The flaps and ailerons were temporarily bolted in place as per the finishing manual, except for the use of regular AN4 nuts. These surfaces were positioned with clamps imposing the appropriate degree of washout. The correct degree of washout at the junction of the aileron was achieved with the aid of a laser level. The upper surfaces of the flaps and ailerons were rivetted.

The right hand aileron had issues. Excess distortion occurred when the upper skin holes were matched to to the innermost rib. Things returned to normal only if a ~0.8mm hole mismatch was accepted. Upsizing was indicated but I did not want to upsize the upper skin rivets. Instead I removed this rib, hole matched to the upper skin, then upsized and recentered the bottom skin holes to 4mm. This rib was a revision 0. The left hand aileron skin was revision 1 and did not have this issue. This latter aileron skin was a replacement for the original, incorrect, skin supplied in the kit.