Trend of airplane flight characteristics
A 1933 NASA technical report, published for aeronautical engineers and researchers, that traces how airplane flight characteristics changed over time. Its pictures are simple line drawings of aircraft plan views, dated 1917 and 1932, showing wing span, tail shape and fuselage proportions side by side. A designer could borrow the clean, schematic comparison of aircraft silhouettes as a model for showing evolution through paired diagrams.
