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The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.
Section titles include design, formulas, general theory (resistance and slip, efficiency, strength of blades, etc.), pattern-making and molding issues, machining and finishing of blade surfaces, and concludes with a brief section on repairs by welding.
Although the propeller lies submerged out of sight, it is a complex component in both the hydrodynamic and structural sense. This book fulfils the need for a comprehensive and cutting edge volume that brings together a great range of knowledge on propulsion technology, a multi-disciplinary and international subject. The book comprises three main sections covering hydrodynamics; materials and mechanical considerations; and design, operation and performance. The discussion relates theory to practical problems of design, analysis and operational economy, and is supported by extensive design information, operational detail and tabulated data. Fully updated and revised to cover the latest advances in the field, the new edition now also includes four new chapters on azimuthing and podded propulsors, propeller-rudder interaction, high-speed propellers, and propeller-ice interaction.·The most complete book available on marine propellers, fully updated and revised, with four new chapters on azimuthing and podded propulsors, propeller-rudder interaction, high-speed propellers, and propeller-ice interaction·A valuable reference for marine engineers and naval architects gathering together the subject of propulsion technology, in both theory and practice, over the last forty years ·Written by a leading expert on propeller technology, essential for students of propulsion and hydrodynamics, complete with online worked examples
Written by experts in the ship design field, this book provides a comprehensive approach to evaluating ship resistance and propulsion.
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ...surface, or wave, noticeable above a revolving screw. In an account of the speed trial of the triple-screw U. S. S. "Columbia" the following is related: "The most noticeable feature of the trial of the ship itself was the remarkable absence of all wave. The triangular foaming cataract at the stern formed with its apex about ten feet from the ship and then subsided in height as it spread in width, until it disappeared fifty feet further aft into a series of gentle waves, similar to those which are seen in the wake of a stern-wheel steamboat." In some instances where the screws revolve very rapidly, and the form of the after part of the vessel and position of the screws are favorable for it, the elevation resulting from the discharge of screws is excessive. In the case of the torpedo boat " Cushing " it attains a height of three or four feet above the normal surface. When the immersion of the screw is sufficient, there may be little or no noticeable elevation of surface over it, because the discharged water will be widely dispersed and equilibrium will be restored before the surface can be affected to a sensible degree. In Trans. Inst. Nav. Arch., 1879, Mr. Griffiths recites the results of experiments he was allowed to make on H. M. steam pinnace No. 22 in 1875 by measuring, with apparatus specially constructed for the purpose, the rate at which the water flowed through the screw disk while the boat was being towed. These experiments showed that over the bottom half the water was little interfered with, but at the top half of the disk the water was dragged with the boat to a certain extent, and only flowed through the screw at about half the speed of the boat's progress. When a ship is being driven by a screw...
Technical introduction to ship propeller hydrodynamics, for researchers in ocean technology, naval architecture, mechanical engineering.