Joint High Speed Sealift (JHSS) Baseline Shaft & Strut (Model 5653) Series 1: Bare Hull Resistance, Appended Resistance, and Alternative Bow Evaluations

Abstract : Model 5653, scale ratio 34.121, was constructed representative of the Joint High Speed Sealift (JHSS) conventional Baseline Shaft & Strut (BSS) hullform. This report documents the Series 1 testing conducted in FY 2006 for the initial evaluation of the JHSS BSS hullform. Series 1 Tests included fully appended resistance, appendage stripping, bare hull resistance, and alternate bow evaluations and selection. The BSS hullform was evaluated with four candidate bows, which included three bulb designs and a stem bow (no bulb). All bow configurations were tested at three ship displacements. The Gooseneck Bulb (GB) was selected for the JHSS BSS based primarily upon the criteria of minimum effective power at 36 knots, for all tested displacements. Effective power predictions for the bare hull and fully appended configurations of the BSS hullform with baseline bulb (BB) were compared to pre-test estimates.