A wing rock model for the F-14A aircraft.
Wright, Steven Roland
Schmidt, Louis V.
Howard, Richard M.
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An investigation of inertial coupling and its contribution to wing rock in the F-14A aircraft has been conducted. Wind tunnel data was used to obtain the stability parameters for angles of attack from zero to 25 degrees, after which linear and nonlinear analyses of the equations of motion were completed. The linearized analysis of the uncoupled longitudinal and lateral-directiondl equations was included to provide a baseline for comparison with the fully coupled, nonlinear equations. In both cases, the equations of motion were solved numerically and time history traces produced to illustrate aircraft response. Results indicate that a stable short period mode can feed damping energy into an unstable dutch roll mode via the coupling of the equations to produce a stable limit cycle very similar to those experienced in the aircraft. Numerous suggestions for follow on research are presented.
"Submitted in partial fulfillment of the requirements for the degree of Aeronautical and Astronautical Engineer from the Naval Postgraduate School June 1992"Approved for public release; distribution is unlimited.
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