Elevator stick forces in spins as computed from wind-tunnel measurements
Experimental study of propellers exposed to oblique air currents
Experiments with a wing model from which the boundary is removed by suction
Influence of loading condition on piloting technique for spin recovery for pursuit airplanes
Resonance vibrations in intake and exhaust pipes of in-line engines -- III
Simple method for increasing lift of airplane wings by means of flaps
Wind tunnel pressure distribution tests on an airfoil with trailing edge flap
Zur Frage der Widerstandsverringerung von Tragfluegeln bei Uberschallgeschwindigkeit, etc