Effect of Length-Beam Ratio on the Performance of a Stepped Planing Boat with an Adjustable Stern Stabilizer

摘要

Two models of stepped planing boats were tested to determine the effect of change in length-beam ratio. The models were tested with the same adjustable stern stabilizer at several loads and LCG locations. The model with the lower length-beam ratio (L sub P/B sub BX = 3.4) had considerably more resistance than the other stepped model (L sub P/B sub PX = 4.7) at low speed and slightly less resistance at high speed. The resistance of both stepped designs at high speed was considerably less than that of a representative unstepped planing boat design. (Author)