1990 年 38 巻 438 号 p. 379-385
Dynamic stability of subsonic airplanes is discussed about the relation between the dynamic stability and the weight. Linearlized, decoupled equations of motion are used and five (5) motion modes are calculated for four (4) different airplanes, which cover 107-times weight-change. The result points out that airplane dynamic stability is generally strengthened with the decrease in weight if the airplane is dynamically stable.