Download or read book Hydrodynamic Characteristics of a Planing Surface with Convex Longitudinal Curvature and an Angle of Dead Rise of 20 Degrees written by Elmo J. Mottard and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrodynamic Characteristics of a Planing Surface with Convex Longitudinal Curvature and an Angle of Dead Rise of 20 Degrees written by Elmo J. Mottard and published by . This book was released on 1960 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrodynamic Characteristics of a Planing Surface with Convex Longitudinal Curvature and an Angle of Dead Rise of 20 written by Elmo J. Mottard and published by . This book was released on 1960 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrodynamic Characteristics of a Planning Surface with Convex Longitudinal Curvature and an Angle of Dead Rise of 20 Deg written by and published by . This book was released on 1960 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrodynamic Characteristics of a Planning Surface with Convex Longitudinal Curvature and an Angle of Dead Rise of 20 O written by Elmo J. Mottard and published by . This book was released on 1960 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Planing Characteristics of a Surface Having a Basic Angle of Dead Rise of 20 Degrees and Horizontal Chine Flare written by Walter J. Kapryan and published by . This book was released on 1952 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-speed investigation was conducted to determine the hydrodynamic characteristics of a planing suface having an angle of dead rise of 20 degrees and horizontal chine flare. The data indicate that the planing characteristics at a given trim depend only on lift coefficient. The ration of center-of-pressure location to the mean wetted length can be considered approximately equal to 0.67 up to 18 degrees of trim. This ratio decreases with further increase in trim. Pile-up of water at the keep of the model was substantial at trims above 12 degrees. Friction drag is negligible at high trims. The resistances for trims at 18 degrees and higher, therefore, may be assumed equal to the load times the tangent of the trim angle.

Download or read book The Planing Characteristics of a Surface Having a Basic Angle of Dead Rise of 20 Deg and Horizontal Chine Flare written by and published by . This book was released on 1952 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to extend the range of available planing-surface data, the hydrodynamic characteristics have been obtained for a planing surface having a basic angle of dead rise of 200 at the keel and horizontal chine flare. This surface is representative of those used on present day flying boats. The wetted lengths, resistances, center-of-pressure locations, and drafts were determined at speed coefficients (Froude numbers) ranging from approximately 3.0 to 25.0, with the bulk of the data obtained at Froude numbers in excess of 7.0. Beam loadings were varied from 0.85 to 87.33. Keel-wetted-length-beam ratios were extended to 7.0 in all cases where excessive loads and spray conditions were not encountered. The data obtained indicate that, during high-speed steady-state planing, the planing characteristics are independent of speed and load for a given trim and depend only on lift coefficient. The difference between the chine wetted length and keel wetted length is constant for a given trim angle and the variation of this difference with trim is shown to be in reasonable agreement with theory. The ratio of center-of-pressure location forward of the step to the mean wetted length, for practical applications, can be considered a constant equal to 0.67 up to 180 of trim. A slight decrease in this ratio occurs with further increase in trim angle. The draft data indicate a pile-up of water at the keel during steady-state planing. Although negligible at low trims, this pile-up was significant at trims of 12 deg and higher. The drag data show that friction drag at trims of 18 deg and higher is negligible and that the resistances for those trims may be assumed equal to the load times the tangent of the trim angle.

Download or read book Effect of Convex Longitudinal Curvature on Planing Characteristics of Surface Without Dead Rise with List of References written by and published by . This book was released on 1959 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High speed Hydrodynamic Characteristics of a Flat Plate and 20 Degrees Dead rise Surface in Unsymmetrical Planing Conditions written by Daniel Savitsky and published by . This book was released on 1958 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collected test data are presented in summary plots which are readily applicable for use in determining the lift, drag, side force, pitching moment, rolling moment, and yawing moment. An analysis is presented of the variation of these quantities with unsymmetrical planing parameters.

Download or read book High speed Hydrodynamic Characteristics of a Flat Plate and 20 Dead rise Surface in Unsymmetrical Planing Conditions written by Daniel Savitsky and published by . This book was released on 1958 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High speed Hydrodynamic Characteristics of a Flat Plate and 20 O Dead rise Surface in Unsymmetrical Planning Conditions written by daniel Savitsky and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Steady state and Oscillatory Hydrodynamics of a 20 Degree Deadrise Planing Surface written by R. Altmann and published by . This book was released on 1968 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrodynamic performance of a 20 deg deadrise planing surface was studied. Experiments were conducted in a high-speed, recirculating water channel. Results are compared with data of previous investigators and with the predictions of an existing planing surface theory. Agreement is very good between earlier towing tank data, the present steady-state test results, and steady-state theory. Good correspondence also exists between oscillatory test data and quasi-steady theory, but scatter in the oscillatory data prevents a rigorous verification of this theory. (Author).

Download or read book The Planing Characteristics of Two V shaped Prismatic Surfaces Having Angles of Dead Rise of 20 Degrees and 40 Degrees written by Derrill B. Chambliss and published by . This book was released on 1953 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal planing characteristics have been obtained for two V-shaped prismatic surfaces ahving angles of dead rise of 20 degrees and 40 degrees. The load, wetted lengths, resistance, center-of-pressure location, and limited draft data are presented for speed coefficients up to 25.0, beam-loading coefficients from 0.85 to 87.33, keel-wetted-length-beam ratios up to approximately 8.0, and trims up to 30 degrees. The data indicate that, for a given condition of load, speed, and trim, and wetted length, the distance of the center of pressure from the trailing edge, and the drag increase with an increase in the angle of dead rise.

Download or read book The Planing Characteristics of a Surface Having a Basic Angle of Dead Angle Rise of 40 Degrees and Horizontal Chine Flare written by Ulysse J. Blanchard and published by . This book was released on 1952 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal characteristics of an surface having an angle of dead rise of 40 degrees and horizontal chine flare are presented. The data indicated that at a given trim the important planing characteristics depend mainly on lift coefficient. The effects of increasing the basic angle of dead rise from 20 degrees (NACA TN 2804) to 40 degrees are to decrease the ratio of the center-to-pressure location to the mean wetted length, to decrease the extent of pile-up of water at the keel, and to increase the friction drag.

Download or read book The Planing Characteristics of a Surface Having a Basic Angle of Dead Angle Rise of 40 Degrees and Horizontal Chine Flare written by Ulysse J. Blanchard and published by . This book was released on 1952 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal characteristics of an surface having an angle of dead rise of 40 degrees and horizontal chine flare are presented. The data indicated that at a given trim the important planing characteristics depend mainly on lift coefficient. The effects of increasing the basic angle of dead rise from 20 degrees (NACA TN 2804) to 40 degrees are to decrease the ratio of the center-to-pressure location to the mean wetted length, to decrease the extent of pile-up of water at the keel, and to increase the friction drag.

Download or read book The Planing Characteristics of a Surface Having a Basic Angle of Dead Rise of 20 and Horizontal Chine Flare written by Walter J. Kapryan and published by . This book was released on 1952 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrodynamic Properties of Planing Surfaces and Flying Boats written by Nikolaĭ Aleksandrovich Sokolov and published by . This book was released on 1950 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the hydrodynamic properties of planing bottom of flying boats and seaplane floats is at the present time based exclusively on the curves of towing tests conducted in tanks.