Dimple question...

Prepping parts for lower skins of fuse. In plans it says to dimple all holes in bulkheads and ribs EXCEPT for the ones where a rib tab is underneath the bulkhead flange. It never says what to do with these, but I assume they want those counter-sunk (even though thickness of metal is marginal at best for CS).



My question is this for those with greater experience than me. Any reason I can't simply dimple these holes with both pieces of metal together? I tried this on scrap of same thicknesses and see no issues with doing so. Dimple looks good and rivet sits flush. BUT, also don't want an un-intended consequence for doing so.

I'm building an 8, so don't know. Check the rivet callout sheet - they may have you install a different type of rivet here?

Give 'em a phone call - they should answer the phones in a couple of hours.

Good catch on the detail there.

I may be wrong, but if you look to the left side of the page you posted, there is a reference to countersinking those holes. See highlighted portion in pic below:

You are correct. These get counter sunk. I think on the next page it shows an arrow pointing to all the tab/bulkead over lay and says to "countersink these holes" I did it on mine and it came out perfect. It seems any place there are 3 piece of metal overlying each other there is a counter sink in the middle piece, with a dimple on the outer most piece.

Thank you for clarification! I usually enjoy showing my ignorance in a public forum. In situations like this, my dad used to say "if that were a snake, he would have bit you"!