966 



HYDRODYNAMICS IN SHIP DESIGN 



Planing, craft, principal forces and moments on, 264 



variation of attitude and position with speed, 329 

 forms, center-of-pressure location, 267 



graphs of dynamic-lift coefficient, 265 

 operating requirements for, 824 

 hull, first space laj'out, 827 



friction resist of, 128 

 number, definition and use of, 16 

 quantitative data on, 263 



factors involved in, 263 

 -type ABC tender, layout of lines, 843 

 Plan(s), body, estimating the ship flow pattern on the, 255 

 shallow-water vessels, 663, 664 

 single-screw, 234-236 

 "standard", 231-234 

 twin-screw, 236 

 Plates, circular and flat, drag of, 291 

 Plating, shell, approx to volume of, 486 



specific smoothness problems, 739 

 Plots, 0-diml waterline curvature, 506, 507 

 Plum stabilizer for trim control on planing craft, 840 

 Points, percentage, definition of, 601, 633 

 Polar diagrams for airfoils and hydrofoils, 75 

 simple hydrofoils, 75 

 list of references, 76 

 Pontoon bridges, floats for, 782 



Ports, freeing, required area for surface ships, 554, 555 

 Position{s), abbreviations for, 911 



center-of-gravity, longitudinal, for planing craft, 840 

 engines, propelling, in the hull, 570 

 longitudinal, center of buoyancy, 486 

 heavy weights in planing craft, 850 

 maximum-area, 482 



paddlewheel, rel to hull and wave profile, 241, 643 

 planing craft, variation with speed, 329 

 propdev(s), data on flow into, 341 

 design rules for, 568 

 estimated flow at, 258 

 wake diagrams at, 358 

 propeller, analysis of flow conditions at, 259 

 propelling machinery in a ship, 570 

 roll-resisting keels, selecting, 691 

 running, predicted, of planing craft, 851 

 screwprop, analysis of observed flow at, 259 

 Positioning, appendages, use of flow diagrams for, 258 

 contra-vanes abaft paddlewheels, 688 

 rudder(s), and planes, 706 



stock axis rel to control-surf blade, 720 

 superstructure and upper works, 561 

 underwater inlet openings, to remain submerged, 701 

 Potential flow, patterns around bodies, 31 



ratio, for shallow water, definition of, 395 

 graphs of, 396 

 velocity-, expression, formulation of, 214 

 formulas for typical 2-diml flows, 17 

 3-diml flows, 20 

 Power (s), backing, from self-propelled model tests, 388 

 brake, first approx, for planing-type motorboat, 832 

 distr, design to equalize, with multiple screws, 573 

 effective, and friction, calculation of, 354 



effect of displacement and trim changes, 355-357 

 estimating, 354 



use as estimate basis for motorboat, 847 

 equalization among multiple propdevs, 573 



Power(s), estimated, first, for round-bottom motor- 

 boat, 853 



lack of reliable data for confined waters, 411 

 formulas, for round-bottom motorboats, 853, 854 

 increasing the, of an existing ship, 387 

 maximum designed shaft, definition of, 574 

 of numbers frequently used, 932 

 reserve, in propelling maohinerj', 575 



to maintain constant speed when wavegoing, 449 

 shaft, estimated, by ideal-efficiency method, 383 

 for fouIed-huU condition, 385 

 from similar vessels, 358 

 first approx, for a ship, 471 



planing craft, 832 

 merit factors for predicting, 380 

 methods and factors for estimating, 358 

 prediction of, 358 



for steady ahead motion, 354 

 second approx, 493 



estimate for planing craft, 847 

 third approx, ABC ship, 894 

 shallow-water, lack of reliable data on, 411 

 Powering allowances, for two or more operating conditions, 

 388 



in ship design, 574 

 data, ship, for steady ahead motion, 354 

 reserves, graphic representation, 576, 577 

 small craft, notes on, 824 

 tunnel-stern craft, 672 

 Prandtl-Schlichting friction-resistance formula, 1 03 

 Predicting, attitude, running, of planing craft, 851 

 basic concepts underlying, 1 

 boundary-layer data for ABC ship, 109 

 cavitation erosion, 156 



on screwprop blades, 149 

 curves of Rr and Pe, 308, 354 

 fouling effects on ship resistance, 120 

 pressure resistance, by analytic methods, 321 

 procedures and reference data, 1 

 propdev performance, 332 

 residuary resistance, from series data, 316 

 running position, of planing craft, 851 

 shaft power, 358 



by merit factors, 380 

 shallow-water resist by inspection, 408 

 ship behavior in confined waters, 389 

 flow patterns, 239 

 at bilges, 255 

 resistance by Gertler adaptation of TSS data, 318 

 by Taylor TSS contours, 317 

 by Telfer's method, 318 

 in canal locks, 413 

 sinkage and change of trim, 325 

 speed and power of ships, by EMB methods, 129 

 surface-wave profile, 246 

 thrust-deduction fraction, 369-371 

 velocity and pressure distribution around ship form, 



257 

 wake fraction, 368 

 wave profile around a ship, 246 

 wind resistance for ABC ship, 282 

 Preliminary design(s), ABC, model-test notes for, 869 

 alternative, preparation of, 501 

 hydrodynamic, of a motorboat, 819 



