Brief Description: Drilled fuselage skin and support angle brackets.
I disassembled the frame from the stiffener angle and put the frame into the fuselage. I then reassembled the stiffener angle to the frame which made it stiff. The frame must bend to get it in or out. I assembled both the vent outlets with plastic inlets (the hose connects to it from the NACA inlet) to the subpanel vent holders (for proper thickness) and connected the support angles by using #8 screws and nuts. This whole subpanel was screwed to the bottom of the frame stiffener angle. The idea is to match drill the vent support angles from inside the cockpit through the side fuselage skins, but there is not enough clearance from the vent outlets to do the drilling. I removed the vents and brackets and just extended the four prepunched holes (for the frame support angle) by adding three more holes using the same spacing. I then reassembled the vent support brackets onto the vent holders and marked the brackets for drilling through the just drilled skin holes. I then removed the brackets and drilled as well as countersunk them on the drill press.
All this disassembling and reassembling took a lot of time. Fabian's instructions were of no help for this part of the project (other than the drawing overview with the angle cross section details). Tomorrow I'll rivet the support brackets to the skin. My gosh, it's past Happy Hour!!
Frame and subpanel with the vents installed. I had to disassemble to do the drilling of the brackets.
Closeup of the vent outlet in the vent holder.
Backside view of the vent. There was no way to drill the bracket from the inside through the skin.
