I had the day off work, so my buddy Andre dropped by and we got started on the F-706 bulkhead. First up is to drill some 0.063″ angle to a couple of support ribs. Here is the rib that goes from the back of F-706 back to F-707.
And here is the rib that runs vertically behind F-706.
Here are how all of the pieces fit together. The reason there is so much structure near the bottom of this bulkhead is that there is a bellcrank mounted here that connects the forward elevator pushrod (from the control sticks) to the rear elevator pushrod (to the elevator horns). All of this is now match drilled.
Here is a closeup of this area. The forward elevator pushrod passes through the hole visible here. The bellcrank mounts between the two ribs near the top of the picture.
I also fabricated the straps that attach the horizontal stabilizer to the F-711 bulkhead. Near the bottom you can see a taper cut into these to clear the side skin of the fuselage.
These are positioned against the front side of F-711 such that the bottom hole is 5/8″ up from the bottom edge and the top edge is 3 19/32″ from the top of the bulkhead.
These are then back-drilled through the bulkhead.
I drilled a series of eight holes along the inside edge of the F-708 bulkhead to attach the static tubing. I also drilled holes in F-706 and F-707 (the two bulkheads forward of this one to pass the static tubing up to the front part of the fuselage. There are also rudder cable holes in almost all of the bulkheads that require opening to 5/8″ With this, I think I am done with all of the drilling for the bulkheads (for now at least). Everything can be disassembled, deburred, dimpled and primed in preparation for riveting.
