The rear spar assembly is a “Z” section channel, reinforced where it joins the fuselage and at the aileron brackets. I deburred the edges of the rear spar channel, and the doubler plates. I trimmed the ends and deburred the edges of W-707G & D and began the rear spar assembly by clamping the W-707E and W-707F doubler plates to the spar. I used the spar as a template to clamp, drill and cleco W-707E/F to the W-707A spar channel.
I marked and cut out the holes for the aileron pushrods. I clecoed the reinforcement fork and the rear spar doubler plate to the spar channel and drilled the rivet holes to full size. I then deburred, primed and prepared the rear spar components for riveting. Some rivets in the rear spar reinforcements also attach ribs, aileron brackets, aileron gap fairings and the flap braces so I taped over these holes so I would not inadvertently put a rivet in one. I then riveted the components of the rear spar together.
Time: 8 hours.
Leonard's RV-7A Build 