Preparing the Center Fuselage – 4

I drilled everything to final size except for the aft two rows (spanwise) on the F-776 center bottom skin.

I fit and drilled the F-623 corner ribs after fluting the F-623 as necessary to fit the skins, and as I was installing steps, I also trimmed the flange to clear the step tube.

I made the F-623A forward and aft attach straps.

Once again, I fit the front half of the F-704 bulkhead to the rear half. I used the pre-fit bolts and spacers I had made earlier to hold the bulkhead together. Then I drilled the holes on the forward edge of F-776 to size.

Time: 4 hours.