Drag measurements on a Junkers wing section : application of the Betz Method to the results of comparative tests made on a model and on an airplane in flight
This is a 1927 NACA technical memorandum from the NASA Technical Reports Server, presenting drag measurements on a Junkers wing section by applying the Betz method to comparative model and in-flight tests. It is aimed at aerodynamic engineers and researchers. The pictures are mostly charts of pressure decrease and wake drag coefficients against position, plus photographs of manometer installations and a wing mounted on an aircraft, offering a designer little beyond a sense of early aeronautical test data graphics.
