2014. The Society of Naval Architects and Marine Engineers
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A model test was conducted to provide a systematic understanding of the effects that displacement and step location have on the performance of a stepped planing hull. Seven different step configurations were tested at three different displacements and over a range of four different speeds in calm water. Of all the configurations tested, the stepped hull configurations showed reduced resistance compared with the unstepped hull. The configuration with the smallest step height forward and the largest step height aft showed the least amount of drag over the speed range tested. The increased displacements had the same effect on craft performance for both the stepped and unstepped hulls.