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WINGS: Flaps riveting

  • Writer: Paul Catterson
    Paul Catterson
  • Dec 9, 2012
  • 2 min read

I riveted the left flap spar and ribs together, including the previously-mated flap track guide arms and deployment arm brackets, ribs and doublers. A little trouble determining the right rivet depth for the AN426AD4 rivets through the rib doublers but worked out well in the end. All ribs and brackets straight and true.


I riveted the left flap bottom skin to the skeleton, including the lower flap track guide doublers. I wasn't a fan of how the blind rivets were holding the doublers to the nose ribs, so I replaced the AAPQ-43 blind rivets with AN470AD4 standard rivets. There was plenty of room to get the bucking bar under there so I am not sure why the remainder of the nose ribs use pull rivets, but this is the only change I made. I am glad I did as it seems more structurally sound and now the doublers are more uniformly attached.

Next, I riveted the right flap spar, ribs, flap track guide and deployment arms. Sooooo much faster on the 2nd flap! Still needed to refresh my memory on my approach to things and rivet sizes as some are .5 sizes I needed to cut down from the stock sizes.

I completed riveting the lower skin surface and doublers to the right flap frame. Since I was a little out of practice with the holiday break, I ended up with more than a few "smileys". I used the rivet removal tour that I obtained with the kit purchase to remove the suspect rivets and got them all fixed up nice.

I went with standard AN470AD4 rivets on the lower flap track guide skin doublers instead of the prescribed blind rivets. Nice tight fit to the skin surface.



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