macrafic
Well Known Member
I'm in the process of disassembling the fuselage to prep the parts (debur, dimple, countersink) for reassembly and rivetiing. I noticed that the 2 lateral forward rivet rows of my forward bottom skin are not drilled to the firewall yet. Some questions.
Did I miss something in the instructions and/or plans? I've checked back and don't see instructions to match drill and dimple/countersink those. Is now the time to do it?
The middle hole on the most forward row is indicated to be left open for the U-720A UPR.AIR OUTLET BRACE. Do I drill this to #12 now or match drill it later with the U-720A? What goes in this hole; a screw or bolt? If a screw, did you guys countersink it or dimple the bottom skin?
For the holes that match up with the floor stiffeners, did you guys dimple or countersink the bottom skin?
I don't have the U-720A. Does it come in the Finish kit or FFW kit?
Did I miss something in the instructions and/or plans? I've checked back and don't see instructions to match drill and dimple/countersink those. Is now the time to do it?
The middle hole on the most forward row is indicated to be left open for the U-720A UPR.AIR OUTLET BRACE. Do I drill this to #12 now or match drill it later with the U-720A? What goes in this hole; a screw or bolt? If a screw, did you guys countersink it or dimple the bottom skin?
For the holes that match up with the floor stiffeners, did you guys dimple or countersink the bottom skin?
I don't have the U-720A. Does it come in the Finish kit or FFW kit?