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Flight Investigation of the Longitudinal Stability and Control Characteristics of the Douglas D-558-I Airplane (BuAero No. 37972) at Mach Numbers Up to 0.89

Melvin Sadoff, William S Roden, John M. Eggleston

Abstract

Report presenting results and analysis of the longitudinal stability and control characteristics of the Douglas D-558-I airplane at a range of altitudes and Mach numbers. It was found that large and rapid changes in elevator deflection and force were required for balance at Mach numbers above 0.84 due to a sharp decrease in elevator-stabilizer effectiveness.

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Key concepts: Airplane, Mach number, Elevator, Longitudinal static stability, Deflection (physics), Aeronautics, Aerospace engineering, Aerodynamics