I know you don't dimple the ribs 1-4 where the wing walk doublers sit, but do you dimple the wing walk doubler "skins" to accept the dimple from the wing skin? If so, how does that dimple sit on the ribs? Thanks.
No. You'll machine countersink the skin and doubler together later.
All of those holes? I am on step #3, pg 16-03. That is the old plans 14-03. I think they are talking about riveting the wing skin, doublers to the ribs at this point. Am I misreading it? Thanks KC.
I read that to be machine countersink for the nutplates, so I match drilled all of those holes, separated, then dimpled the wing skins. Then I started to dimple one of the wing walk doublers, about 10 holes, then realized that it wasn't going to sit well on the ribs.
So I guess my choices are, 1. try to dimple the other side to flatten them out some and countersink (probably won't work too well), 2. Order new parts, including two skins, or 3. Sell the kit.
I dimpled the entire left wing. I dimpled the tops of all the ribs and attached them to the spar. My only solutions were to remove the ribs from the wing, un dimple, or dimple the doubler and skins. The former meant removing rivet from the spar, which I thought that I would do more damage than good. I asked a EAA tech advisor/counselor and he said it was OK to dimple and move on. He actually said he thought that dimpling was better and that the countersinking would not be as structurally as sound as dimpling.
I was advised to NOT Undimple by the same EAA guy. If you do your skins will look like ****. I believe that the skins will be covered there with the grippy black stuff, so you won't see it anyway. I did have to undimpled one hole in rib 1 to install a nut plate and you could tell that it was previously dimpled.
I think that you might have to undimple the skin/doubler and counter sink where the torque assemble is located. I assume that you already riveted that in place undimpled. If so, then you will have to undimple there on the skins and doubler plate and machine counter sink. I am pretty sure that I would not try to dimple two pieces of metal at the same time.
I forget what size rivets I used to rivet the wing walk section (ribs 1-4), but they were longer than called out due to the dimpling. I measured to determine the length. I don't think that I had to cut the rivets. I believe that I found one that worked. I did buy a rivet cutter and it is a great to to have. I used it where I find that the rivets in the plans are too long. I cut them to get them to the right size.
I am not the expert here. Just telling you what I was advised to do and what I did.
I would not sell.
Hopefully this was useful for you.