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DZ, inch 0.08 0.04 0 -0.04 -0.08 Videogrammetry to Measure Model Geometry Non-Metric positioning system Three-Axis accelerometer system Force Positioning System Balance (Inside Fixture) Weight Application Rod In-Flight • Facilities • National Transonic • Transonic Dynamics WT • 16-Ft Transonic WT • Unitary Plan WT • 14 by 22 Subsonic WT • Basic Aerodynamics Research Tunnel • Accuracy • Lab: < 0.005° • Tunnel: < 0.05° F/A-18 Active Aeroelastic Wing (under development) (collaboration with NASA Dryden) Applications • Main wing element • Control surfaces • Pitch angle • Sting bending • Spectral analyses • Installation repeatability • Aft-body bending • Horizontal stabilizer deformation • Test section wall deformation • Acquisition up to 1 KHz Model geometry in near real-time with minimal impact Videogrammetry is a low-cost, flexible, and accurate near real-time method to determine model geometry under load from subsonic to supersonic, with minimal impact to the data acquisition cycle References: J. of Aircraft Vol. 38, No. 4 and No. 6, 2001; AIAA-2002-2794 POC: Gary Fleming Email: firstname.lastname@example.org