AVL is a vortex-lattice model best suited for aerodynamic configurations which consist mainly of thin lifting surfaces at small angles of attack and sideslip. A program for the aerodynamic and flight-dynamic analysis of rigid aircraft of arbitrary configuration. It employs an extended vortex lattice model for the lifting surfaces, together with a slender-body model for fuselages and nacelles. General nonlinear flight states can be specified. The flight dynamic analysis combines a full linearization of the aerodynamic model about any flight state, together with specified mass properties.

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