Title: 21-12 - Flap Hardware
Assemble 4/24/23 - 0.4h This turned out to be an abbreviated step, with a couple of items pushed to my “to-do” list later in the build. The only step I completed was to attach the control rod end to the inboard location on each flap. The rod end is secured with an AN4-11A bolt to the nut plate riveted to the inboard nose rib. The torque for the AN4 bolt is 50-70 in-lbs. I set my torque wrench for 60 in-lbs plus drag, which resulted in 70 in-lbs on the right and 68 in-lbs on the left. I also noted that Section 5 of the plans says to lubricate the shank of the bolt when you are torquing it rather than a nut. The other thing worth noting is the drawings show the thinner washer closest to the bolt head with the thicker washer closest to the threads. Two items I did not complete at this point were press fitting the bushings in the wing hinge attach points and final attachment of the flaps to the wings. I plan to install the bushings after I attach the bottom wing skins. The bushings are wider than the hinge brackets, and could interfere with fitting the bottom skins over the hinge brackets. I'll complete the final attachment of the flaps after the wings are attached to the airplane. Until then, the flaps will go into storage with the wings at the airport. [Torque Wrench]


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