Measuring and testing – Moisture content or absorption characteristic of material
Patent
1975-12-22
1977-04-26
Goldstein, Herbert
Measuring and testing
Moisture content or absorption characteristic of material
73 93, 73 99, G01M 700, G01N 332
Patent
active
040193756
ABSTRACT:
An apparatus for inducing vibratory oscillations in an airfoil is provided to simulate the dynamic aeroelastic interaction between the airfoil and a gas flow field. The apparatus includes first means for supporting the airfoil during inducement of the vibrations and second means movable in response to variations in magnetic flux to rotate the airfoil about first and second axes. Third means are provided for generating a variable magnetic flux field in response to an electrical control signal provided by fourth means.
REFERENCES:
patent: 2362467 (1944-11-01), Clark
patent: 3680366 (1972-08-01), Moser et al.
A. R. Willson, Vibration Testing of Airplanes, Electronics, Mar. 1949, pp. 86-91.
S. Fleeter et al., The Torsional Flutter Characteristics of a Cantilevered Airfoil, etc. AIAA Paper No. 74-530, June 17-19, 1974, pp. 1-8.
S. Fleeter, et al. A Unique Supersonic Inlet Unsteady Aerodynamic Cascade Experiment, AIAA Paper No. 74-622, July 8-10, 1974, pp. 1-8.
Baker John E.
Ellis Delmar H.
Scott Ralph W.
Shaffernocker Wayne M.
Beauchamp John P.
General Electric Company
Goldstein Herbert
Lawrence Derek P.
Policinski Henry J.
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