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AviationTest Facilities, Equipment and Methods

Aerodynamic Stability Testing with Magnetically Suspended Models.

Authors: Desikan Bharathan; Sam S. Fisher; Ricardo N. Zapata; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF ENGINEERING SCIENCE AND SYSTEMS
Abstract:
The practicality of measuring aerodynamic stability derivatives using models suspended in the University of Virginia water-cooled electromagnetic suspension facility is examined. Two non-spinning models are tested in pitch and heave oscillations in a subsonic flow, and both static and dynamic derivatives are determined from the measurements. The two models are 7-caliber and 5-caliber cone cylinders. For the tests, M = 0.071 and Red = 13,000. Pitch and heave oscillatory motions are induced by forcing the model laterally with its center of mass displaced from its center of magnetization. Each model's response is measured in a frequency range near pitch resonance.

Description: Final rept. 1 Mar 74-31 Aug 76
Pages: 134
Report Date: SEP 1976
Contract Number: AFAFOSR270574
Report Number: A374130

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Keywords relating to this report:
AERODYNAMIC STABILITY
CALIBRATION.
ELECTROMAGNETIC FIELDS
MAGNETIC FORCES
SIGNAL PROCESSING
SUSPENSION DEVICES
WIND TUNNEL MODELS
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