Dynamic stability.
CFR · 2024-01-01 · US · Title 14
(a) Any short period oscillation, not including combined lateral-directional oscillations, occurring between 1.13 V (1) Free; and (2) In a fixed position. (b) Any combined lateral-directional oscillations (“Dutch roll”) occurring between 1.13 V
official document · source cfr-2024 · id 14:§ 25.181