November 15, 2019

Close-Out Floor Ribs

(Fuselage manual pg E9)

I decided that now was the right time to pin down the close-out ribs that go above the torque tubes. Next step is to install the pushrod linkages, which would block access to the rivets that need to go into the ribs, making it much more difficult.

As I’ve written about before, these torque tubes are ridiculously difficult to get aligned just right so that they move smoothly. The fit of the closing ribs also plays a part in this, since the plastic bushings on the torque tubes are pinched in place by the closing ribs. So, after a few more iterations of adjustments to the ribs (little bit of sanding here, little bit of shaving there), I used a C-clamp to hold the ribs in place (rather than clecos), and then installed rivets, reaming holes as necessary. I think I was successful, as the joysticks still move pretty freely after I finished riveted the ribs.

I used a c-clamp to hold the two inside closing ribs in place while I installed rivets – these two ribs were the most sensitive to alignment, so I wanted to make sure the rib didn’t move at all while I was installing the rivets.
Installing rivets on the outer close-out rib. I was able to use the powered rivet puller for a few rivets, but the majority I had to pull by hand.
Nice wide-shot view of me and my workshop, courtesy of my husband’s new iPhone 11 (which has a wide FOV lens)

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