Model Tests of a Round-Bottom Patrol Boat in Smooth and Rough Water

摘要

Performance characteristics in smooth and rough water are presented for a round bottom patrol boat, based on tests conducted on a 1/16 model (No. 5016). Comparison is made with another model of smaller length/beam ratio (model No. 4927). Model 5016 exhibited good resistance and EHP (effective horsepower) characteristics in smooth water up to a ship speed of 30 kts when compared with the 6 previously tested models of R-985. (AD-605 309) In rough water, the resistance in Sea States 3 and 5 is at least comparable if not better than these models. Motions and accelerations of the present model in a Sea State 3 were superior in all instances. In Sea State 5, it is still impractical to operate this boat much beyond 25 or 30 kts. In this range, the motions and accelerations of the present model are at least comparable to the other round bottom hulls, but not as good as the hard chine forms.