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

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Videogrammetry to Measure Model Geometry
Non-Metric positioning system
Three-Axis accelerometer system
Force Positioning System
Balance (Inside Fixture)
Weight Application Rod

• Facilities
• National Transonic
• Transonic Dynamics WT
• 16-Ft Transonic WT
• Unitary Plan WT
• 14 by 22 Subsonic WT
• Basic Aerodynamics Research Tunnel

In-Flight

• Accuracy
• Lab lt 0.005
• Tunnel lt 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 g.a.fleming_at_larc.nasa.gov