A variable pitch fan for a propulsion device is provided. The variable pitch fan includes a plurality of fan blades coupled to a disk and a rotatable front hub covering the disk. Each fan blade is rotatable about a pitch axis to vary a pitch of the fan blade. The pitch is variable within a pitch range that is at least about 80° to about 130°. Each fan blade extends radially outward from the disk along a span from a root to a tip. A portion of the span adjacent the root defines a root span region, a portion of the span adjacent the tip defines a tip span region. A solidity of the variable pitch fan is at least 1.0 in the root span region.
Pitch range for a variable pitch fan
2019-05-14
Patent
Elektronische Ressource
Englisch
Self-adaptive variable-pitch and variable-pitch propeller
Europäisches Patentamt | 2024
|Europäisches Patentamt | 2021
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