Dimpling the edge that attached to the firewall. Nice spring day calls for a Hawaiin shirt!
Used a couple peiced of scrap box channel to create a "spreader" so that I can remove the spar tunnel.
The spar tunnel removed intact!
Back of the spar tunnel.
These side channels all need to be countersunk for flush rivets in-place.
Clamping the tunnel down made it easier to work on.
Side clips dimpled.
Dimpling for the side clip.
Dimples
Dimpling the clips.
Coundersinging the side channel. I used a scrap 2x6 and drilled out a couple of openings where the tip of the bit protrudes through.
Dimples, countersunk & recleco'd
The dimpling caused a little warping of the sheet metal. Nothing too bad.
The other side was a little worse.
Worse spot, but I think some hardware goes through here later.
Dimpling caused a little cuppin of the edges.
The three end rivets in the F16-04 are handled a little differently. See the Detail G in F1 for an explanation. I needed to confirm with Sonex.
Other end's same 3 rivet holes.
