Drilling Holes for Fabric Rivets on Wing Bottom

We decided to use fabric rivets instead of rib stitching on the wings.  To make drilling the holes easier, Ed welded up a drilling guide for the rib cap strip holes.  All we had to do is measure where we wanted the hole to be drilled and the guide allowed for a quick, precisely located hole to be drilled.  We played around a lot with hole spacing on the wing bottom.  When one hole was okay, another would be located in an undesirable location.  We finally settled on starting 1" along the rib cap strip from the front of the wing and the hole spacing was 2.75".  This allowed no holes to be drilled on or near the drag tubes and wing spars.  All holes were drilled in the bottom of the left wing.  Hours: 3

Ed drilling fabric rivet hole using drill guide