滑走艇の超高速航走時に作用する揚力により発生する横不安定現象に関する研究

-不安定現象の発生メカニズムと推定法-

抄録

In this study, one of mechanisms of transverse stability loss at super high forward speed is investigated. Towing tank test is carried out to observe the characteristics of the instability and it is confirmed that the instability has strong relationship to the change in running attitude and hydrodynamic roll moment due to high forward speed. And it has been also found that the dangerous maneuvering motions may be caused by heeling due to the transverse stability loss. Based on some existing empirical formulas to estimate the dynamic normal force (; lift) acting on planing hull, the estimation method of inception of the unstable phenomenon is proposed and its validity is confirmed through comparing with measured results.