Rotor or propeller blade with dynamically variable geometry and other properties
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United States of America Patent
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Oct 15, 2019
Grant Date -
Nov 9, 2017
app pub date -
May 7, 2016
filing date -
May 7, 2016
priority date (Note) -
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Abstract
A blade for the cycloidal marine propellers or cycloidal aerial rotors operative, in response to control system commands, to dynamically; flex along its chord, vary its relative pivot point position, change its planform by extending or retracting a trailing edge extension, differentially, turn the flap along the trailing edge in either direction or allow it to be turned by the flows. For the reversal of the leading and trailing edges for operation in reverse airflow and other conditions the blades are provided with edges that can be made rigid when functioning as the leading edge and flexible if needed when functioning as the trailing edge. Also, the blades are configured to vary and reshape their cross-sectional profile thickness. Finally, the blades are given on command flow permeability along much of their surface.
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