Investigation shows that gyrostatic effect of airplane propellers with more than two blades results in displacement of natural frequencies of elastically supported engine to extent which can no longer be ignored.
Displacement of natural frequencies of elastically supported airplane engine due to gyrostatic effect of propeller
Die Verlagerung der Eigenfrequenzen eines elastisch aufgehaengten Flugmotors infolge der Kreiselwirkung der Luftschraube
1938
Article (Journal)
German
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