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Hydrodynamics Of Planing Hulls
Planing craft are the most common boats used all around the world for small commercial, military and pleasure craft. Hulls available for planing craft are many, differing for geometry, shape and dimensional ratios. Despite of that, there is a lack of experimental data on these hulls and there are no effective and user-friendly tools, available for Power and Resistance Assessment in the Preliminary Design Phase, except in the case of very simple hull geometry. The goal of this book is to try out a new effective and robust tool useful to the small-boat Naval Architect, to attack the Resistance Assessment Problem for a planing craft in calm water during the Preliminary Design Phase. Rem tene, verba sequentur.
Supercritical Planing Hulls
The intolerable pounding of conventional planing hulls is the chief reason for the development of alternative hydrofoil and SES vehicles, in an attempt to achieve high speeds with motions that are commercially and militarily acceptable. This approach has been to find out why a conventional planing hull pounds, and then to devise new planing hull forms which avoid the problem. Work over the last ten years, including a dozen experimental boats, has resulted in forms which largely meet this objective. Experimental data indicates that the latest hull - the SEA KNIFE - has a better ride than SES or surface-piercing hydrofoils, and for a much lower cost, is not much inferior to the fully-submerged hydrofoil.
The Prediction of Porpoising Inception for Modern Planing Craft
The purpose of this project was to study porpoising, one of the most common forms of dynamic instability found in planing boats. In descriptive terms, it is a coupled oscillation in pitch and heave that occurs in relatively calm water. These oscillations can be divergent in amplitude, leading to loss of control, injury to occupants or damage to the craft. The mechanics of porpoising have been studied sporadically from theoretical and experimental perspectives for many years. Studies have shown that the inception of porpoising is influenced by displacement, center of gravity location, and various hull characteristics such as deadrise and beam. Until now, Day & Haag's thesis provided the only ...
Aerodynamic Characteristics of Three Planing-tail Flying-boat Hulls
An investigation was made to determine the aerodynamic characteristics of three planing-tail flying-boat hulls which differed only in the amount of step fairing. The hulls were derived by altering the step and afterbody of a conventional flying-boat hull having a transverse step.
Hydrodynamic Design of Planing Hulls
"Presented at the January 1964 Meeting of the New York Metropolitan Section of The Society of Naval Architects and Marine Engineers" -- p. 71.
