Free-Spinning Wind-Tunnel Tests of a Low-Wing Monoplane with Systematic Changes in Wings and Tails IV : Effect of Center-of-Gravity Location
A 1939 NASA technical report on wind-tunnel spin tests of a low-wing monoplane model, examining how centre-of-gravity placement changes spinning behaviour; it was written for aeronautical engineers and researchers. The pictures are black-and-white photographs of the model from front, top, and side views, plus rows of wing and tail planform variants laid out for comparison, offering a designer a clear reference for aircraft silhouettes and sequential comparison layouts.

