SECTION 22: FLAP

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How to tell the skins apart
- There are two skins that have 2 holes on the long edge about in the middle closer together. Those are the top skins. They have the same shape and same holes, but are still not quite identical as the punch direction of the holes is opposite. Probably better to put the side with the burs on the insides, then dimpling will just pronounce the punch deformation more.
- The remaining two skins are the bottom skins, do same selection for left / right wing by looking for the burs and keep them on the inside.

Step 2
The nose ribs don't have all holes pre-drilled. During this step, you will match-drill from the nose skin to the rib flanges to add them.
Step 5
One needs to fabricate a shim for the cage of the countersink tool to rest on and then adjust the depth of the counter sink to account for the shim thickness. This is only explained in the RV-14 build manual which uses the same construction. See the RV-14 Flap build instructions, page 21-6 here.
See also this FB thread.

Step 4
If your nose ribs look different then in the manual because yours don't have holes in some flange sections, please read page 22-5, step 2 where the ribs get match drilled to the holes in the nose skin.