The Dornier "Do.X" flying boat (German) : a giant high-wing monoplane
Tapered wings, tip stalling, and preliminary results from tests of the stall-control flap
Wind-tunnel investigation of 20-percent-chord plain and Frise ailerons on an NACA 23012 airfoil
Wind-tunnel investigation of a plain and slot-lip aileron on a wing with a full-span slotted flap