PROPELLER BLADE OR AIRFOIL WITH HOLLOW COMPOSITE ROOT
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Apr 25, 2023
filing date -
Apr 25, 2023
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Abstract
A propeller blade or airfoil of a turboprop of composite material includes a fibrous reinforcement densified by a matrix, the propeller blade or airfoil including, in a span direction, a root and an aerodynamic profile. The fibrous reinforcement includes a fibrous preform having a three-dimensional weave with a root preform portion present in the root and an aerodynamic preform portion present in the aerodynamic profile, the root and aerodynamic preform portions being linked to one another by the three-dimensional weave. The root preform portion of the fibrous preform includes an unlinked area delimiting an internal root recess forming a cavity opening at a free end of the root.
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