The Numerical Solution and Analysis of Airplane Spin Equations Modeled in a Fixed Coordinate System.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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Three forms of the airplane spin equations of motion, derived by Buehler form the basis for the development of a computer program designed to seek dynamically stable equilibrium solutions of a spinning aircraft. The program incorporates two solution techniques one based upon Euler integration, the other, a version of minimization by gradient search. Secondary programs are developed to generate power off glide parameters for use in the validation of the equations of motion, and evaluate equation residuals obtained from a grid of initial conditions over the potential solution space. F-111 and F-4 aerodynamic force and moment models were utilized to evaluate the solution methods and equations of motion. The numerical results indicate that the F-111 and F-4 data are not representative of the actual aircraft and, therefore, it is highly unlikely that dynamically stable equilibrium solutions can be achieved from these models. Author Modified Abstract
- Attack and Fighter Aircraft
- Fluid Mechanics