Starting section 21 I start to read through the instructions and pull the parts from storage. The language in section 21 starts to change from how the steps are defined in previous chapters a bit so I wanted to mention how I approached it.
Typically you see instructions to flute ribs, cleco together, match drill, then deburr, dimple and if desired prime. For the ailerons, instructions start with flue, final-drill, and dimple before you assemble anything. As I typically dimple after I prime parts, I’m having to deviate from the order of operation in the plans just a bit. (Not that this is a bad thing as I go on to explain).
Since I want to prime parts, then dimple, I’m “skipping” over the areas where I’m asked to dimple or rivet and assembling all the parts using clecos to ensure I can match/final-drill where necessary and that I have all the parts properly marked / labeled. I basically ended up building the whole aileron using clecos. *Note: cutting, sanding, and deburring all the stiffeners was a bit of a process!
I’m not sure if the change from match drilling to “final-drill” is due to better tolerances in the MFG processes for the skin and stiffeners, but I decided to match drill and label all parts.
With all the ailerons assembled with clecos, match drilled and deburred, now I just have to wait for a decent day to prime before I can start begin final assembly.