Abstract:A dynamic instability is described for rolling, finned missiles with canted fins. The instability occurs as an undamping of the angle of attack and is caused by differential lift and drag from unequal effectiveness of the windward and leeward fins. The instability is similar to a Magnus instability in that a yawing moment is produced that unequally damps the positive and negative precession motions. The equivalence of the Magnus coefficient and the differential fin forces is derived, and the instability is dem… Show more
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