A simple mechanical analogue for studying the dynamic stability of aircraft having nonlinear moment characteristics

Thomas N. Canning
naca-tn-3125
Feb 1954


The analogy between a ball rolling over a contoured surface and a pitching and yawing aircraft is developed. Test results from a model representing a missile with linear moment characteristics are presented to verify the analogy. Several examples of the behavior of nonlinear systems are also given. These examples include results from ballistic-range firings as well as analogue tests.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1954/naca-tn-3125.pdf