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3-D model used for F-22 testing

A THREE-DIMENSIONAL (3-D) computer-generated "ballistic vulnerability analysis model" of the Lockheed/ Boeing F-22 next-generation air-superiority fighter is being used to determine the aircraft's ability to withstand weapons damage. The model was developed by the Lockheed Martin Tactical Aircraft Systems Vulnerability Team to show which sections of the aircraft are vulnerable to ballistic threats such as missile warhead fragments, bullets from anti-aircraft artillery and aircraft-mounted cannons. Analysts and systems designers use the model to try and reduce or eliminate this vulnerability by developing modifications. The model was derived from NASTRAN finite-element data for the external skin and internal structure, and from CATIA (computer-aided three-dimensional interactive application) design data for the remaining internal components.

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