atio lift/drift bring out the relative effectiveness of the wings. Thus the best L/D ratio is 17 for the monoplane, 13.8 for the biplane, and 12.8 for the triplane. These values refer to small angles of attack corresponding to high flight speed. For a large angle of attack, 16 deg., the ratios are… … biplane to triplane. In Part II. Stable Biplane Arrange- ments, it is recorded that the centre-of-pressure motions for the monoplane and for the biplane were nearly iden- tical. The present experiments confirm this conclusion, but Ithe monoplane curve is omitted for the sake of keeping the figure…
Airplanes
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