Ride Characteristics of Catamaran Sea Loiter Aircraft in a Seaway.

摘要

Results from model tests of a catamaran sea loiter aircraft model conducted by The Netherlands Ship Model Basin in 1966 are reviewed. Data are also presented from recent tests of a similar model conducted at the David W. Taylor Naval Ship Research and Development Center. Results from both test programs show that the catamaran hull spacing has little effect on longitudinal motions; lateral motions are strongly affected by hull spacing. The heave and pitch reasonant frequencies are nearly equal. Hull geometry (other than spacing) and the location of the center of gravity have little effect on motions. The gross size of the aircraft and the various radii of gyration do influence motions. Little damping in roll and pitch is present. Motions of full-scale aircraft are extrapolated from these model results. These scaled data are compared to numerical predictions for similar designs. Heave accelerations at the center of gravity compare favorably; pitch and roll motions do not compare well. (Author)