- A pitching motion in which kinetic and potential energy (speed and altitude, in this case) are traded. Each cycle typically lasts about 60 s and may continue for many minutes. The motion resembles a roller coaster in which, as the aircraft nose pitches up, the air speed decreases, and as the nose drops, the air speed increases. There is, however, little or no change in the load factor if the aircraft has a neutral pitch stability. The pitching motion is usually damped, and the degree of damping is dependent upon the aircraft’s design characteristics (i.e., the amount of positive pitch stability).
Aviation dictionary. 2014.
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phugoid — noun An aircraft motion where the vehicle pitches up and climbs, increasing speed, and then pitches down and descends, decreasing speed … Wiktionary
phugoid — phu·goid … English syllables
phugoid — ˈfyüˌgȯid adjective Etymology: irregular from Greek phygē act of fleeing, avoidance, flight + English oid; akin to Greek pheugein to run away, flee more at fugitive : of, relating to, or representing variations in the longitudinal motion or… … Useful english dictionary
phugoid curve — noun also phugoid ( s) : a curve showing the motion of the center of mass of an airplane during a phugoid oscillation … Useful english dictionary
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