A Comparison Between the Theoretical and Measured Longitudinal Stability Characteristics of an Airplane
This is a 1934 NASA technical report comparing calculated and flight-measured longitudinal stability of an airplane, illustrated with photographs of aircraft and cockpit fittings. Its pictures show a sliding-weight installation, a high-wing monoplane seen head-on, a biplane in profile, and a cockpit crank, offering a designer period engineering photographs with bare, functional detail and strong wing and strut geometry.
