Set out to figure how to set the two pop rivets on the left
side of the trim tab. I've play around with this a bit...Really wish vans had
pre-punched holes here like the other side. Oh well. Need to be careful of the
minimum edge distances from the bottom tab, and also need to be able to get the
dimple dies in there.
A CS4-4 rivet diameter is about 0.125". According to
AC-43.13 rivet edge/spacing distances is measured from the center of the rivet
to the edge (or center of the next rivet). For single row rivets, edge distance
shall not exceed 2x the rivet diameter, and spacing shall not be less than 3x
the diameter. This being the rule of thumb. Then the center of the rivet hole
needs to be minimum 0.25" from the edge and spacing shall not be less than
0.375". To be safe I kept my distance 0.310" from the edge and a
spacing of 0.54"
After I drilled the holes, everything went really well. I
dimpled the new holes and there was just enough room to dimple them with the
CS4 dies. I then cleco'd the trim tab assembly together and set the CS4 pop
rivets followed by all the AN426AD3-4 rivets for the trim tab hinge. Looks
great!
The trim tab is done!
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