The performance of three different shaped hulls was evaluated by experiments and computations to identify a hull form that provides low calm water resistance at cruise speed while remaining dynamically stable at high speed.
Donald L. Blount and Associates, Inc. has design cognizance over four of the world’s fastest fifteen megayachts. Included in the list of the fastest yachts are the gas turbine Motor Yacht DESTRIERO and the gas turbine Motor Yacht FORTUNA. GTMY DESTRIERO, length overall of 67.7m (222 feet), holds the record for the fastest Eastbound trans-Atlantic crossing at 53.09 knots.
The turning characteristics and capabilities of displacement vessels are well understood and documented. Standards for the maneuvering capability of displacement vessels exist.
Due to reductions in materials costs and advances in fabrication technology, the marine industry has recently seen a proliferation of custom and semi-production aluminum boats. There always have been a number of large yacht builders who work exclusively in aluminum alloys, and they have been fairly price competitive alongside the well-known FRP custom yacht builders.
In this paper, the feasibility of experimentally testing 3D printed propellers was investigated at Reynolds numbers where scale effects were significant. Hama strips were printed on the leading edge of a B-series model propeller’s blades and open water tests were performed with both unstimulatedand stimulated propellers for ℝe=105to5×105.
This paper considers the initial feasibility of an unmanned surface vessel (USV) using a Series Hybrid Diesel Electric propulsion system.
Cavitation adds a dimension to propeller operation that necessitates rational design practice to approach a good balance of craft requirements. This paper discusses propeller characteristic format to reduce the computation time to make performance predictions and propeller selection for partially and fully cavitating conditions.
Propellers recessed into tunnels are worthy of consideration as an alternative to propellers on inclined shafts or waterjet propulsors. The enhancements achieved by using a partial tunnel include reducing the shaft angle, decreasing navigational draft and allowing the propulsion machinery to move aft for an appropriate longitudinal center of gravity location and/or improved arrangements.
This paper presents the results of resistance tests of five planning boat models of different length-beam ratio. Each model was tested at a number of loads and LCG Locations.
This DLBA paper helps to apply the powerful tool of transport efficiency, expanding upon the information presented in the paper titled “Achievements with Advanced Craft”. Using this calculation technique, DLBA developed a tool that can quickly evaluate the performance of a specific boat, and accurately predict vessel performance based on minimal information.
