In Case You Missed It
Laminar- vs. Turbulent-Flow Airfoils
Airfoils break down into two general classes based on the behavior of the boundary layer.
Ask the DAR
Should A&Ps also get a repairman certificate, using multiple pilots for Phase 1 testing, putting E/AB wings on a certificated fuselage.
Old School Solution
It doesn’t seem that long ago, but maybe it was, that the essence of a sport airplane was a biplane.