Feathering propeller removes wind milling evil by its ability to present only edges of its blades to airstream and no surface on which undesirable turning pressure can be exerted; it reduces drag to very minimum; electric and hydraulic types described.
Virtues of feathering airscrew
Aeroplane
Aeroplane ; 59 , n 1543
1940
Article (Journal)
English
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Blade feathering and feathering hinges
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