Using info from VAF, a location was chosen for the aft NACA vents in the fuselage sides. This location is aft of the rear baggage bulkhead and parallel to the fuselage longerons.
A parallel center line was drawn on each side of the fuselage. According to the VAF forum, the vent was center in between the fuselage bulkheads and the aft portion of the cut out is approximately 34 1/4" from the static ports.
Trace forward NACA vent shape on cardboard.
Cut shape from cardboard.
Tape outside cardboard shape into place on fuselage sides making sure it is oriented correcly.
Drill corner holes using #30 drill to provide corner radius.
Using p-body saw, remove fuselage skin to drawn line.
Final shape NACA opening using files, grinders, s/b wheel, 320 s/p.
