956 



HYDRODYNAMICS IN SHIP DESIGN 



Devices, trim-control, Plum stabilizer, 840 

 Diagonal, bilge, hull shape along, 517 

 Diagrain(s), analysis, wake-, for ABC ship, 367 

 flow; see Flow 



about hydrofoils, list of references, 78 

 analysis of, 239 

 flow and flow net, around various bodies, 31 

 for positioning appendages, use of, 258 

 upper works configurations, 276 

 lines-of-flow, typical, on ship models, 248 

 model surface-flow, analysis of, 250 

 polar, for hydrofoils, 75 

 list of references, 76 

 pressure, details of, 9 

 running attitude and ship motion, 325 



trim and wetted surface, for planing craft, 851 

 source-sink flow, delineation of, 52 

 streamline, published, references to, 32 

 surface-flow, on models, anah'sis of, 250 

 velocity and pressure, around various bodies, 31 



2- and 3-diml bodies, 43 

 wake-fraction, at propdev positions, 358 

 -survey, TMB 3-diml, analysis of, 362 

 3-diml, 360 

 Diameter, pitch-, ratio; see Pitch 

 Diameter(s), hub and propeller-disc, 612 



screw-propeller, Burtner formula for, 569 

 fqr hub, 601 



optimum, comments on, 597 

 paddlewheel, relation to hull design, 643 

 selection of, 597 

 Differential pressures at screw propeller, data on, 343 

 Dimension(s), and rel data on Great Lakes oreships, 

 758-760 



icebreakers, 800-803 

 typical ships, 223-228 

 blade and paddlewheel, calculating, 641 

 chine, design check of for motorboat, 846 



planing craft, 837 

 limiting, of propdevs, 568 

 physical quantities, 4 

 principal, first approx, 464 



second approx, 475 

 ship, basis for selection, 457 

 transverse, for shallow-water running, 662 

 Dimensionless general equations for ship forms, summary 

 of, 192 

 longitudinal curvature, graphic determination, 196 



instruction plan, 198 

 numbers; see Number 



quantitative use of, 7 

 relationships, summary of data on, 8 

 representation of ship surface, 189 

 ship coordinates, definition sketch for, 189 

 surface equations, application of, 191 

 Dip and dip ratio of paddlewheel, definitions of, 639 

 Direction of rotation of propdevs, for ship design, 572 

 Disc, clearances for propellers; see Clearances 

 flat, drag of, 291 



propeller-, and hub diameters, design notes, 612 

 Discharge, abovewater gas and smoke, 563 

 openings, water, design of, 701 

 underwater, gas and smoke, 565 

 Discontinuities, estimating drag of, 294 



Discontinuities, longitudinal, and knuckles, 560 

 on a rudder and horn, 743 

 transverse, in abovewater body, 561 

 Discontinuous bilge keels on liner Oranje, 692 

 -section hulls, design of, 768 

 friction drag on, 127 

 Displacement, and draft conditions for model tests, 871 

 trim, effect of changes on resistance, 310 

 changes, effect on effective power, 355 

 -length quotient, first approx, 465, 466 

 relation to fatness ratio, 930, 932 

 of appendages, 295, 296 

 -tj-pe craft, ultra-high-speed, design of, 754 



motorboats, design for, 823 

 volume and size, considerations of, 448 

 Distribution, blade-thickness, for screwprop, 620 

 of power, equal, among multiple propellers, 573 



pressure, chordwise, on hydrofoils, 81 

 pressure, along a vee entrance, 48 



and magnitude on planing-craft bottoms, 266 

 radial thrust, of screwprop, first approx, 615 



second approx, 616 

 spanwise, of circulation and lift, 83 

 velocity and pressure, about asymmetric body, 43 

 around bodies, references to, 44 

 body of revolution, 40 

 hydrofoils, and list of refs, 80, 81 

 schematic ship forms, 47 

 ship forms, prediction of, 257 

 Diverging waves, effect on calculated resistance, 220 

 Diving planes ; see Plane(s) 

 Docking keels, design of, 695 

 sketches, 697 

 vertical bossings as, 686 

 Double- or multiple-chine hull form, design of, 762 

 -ended ships; see Ferryboats 



propelling plant and propdevs for, 792 

 solutions to equations of motion, 6 

 Doublet, and circular stream form, 61 



definition and use of, 18 

 Doubly refracting solutions, use in flow studies, 48 

 Draft, and beam for preliminarj' design, 468 



displacement conditions for model tests, 871 

 trim variations, estimated, for ABC ship, 481, 498 

 immersed-transom, 530 

 increased, with age, comments on, 566 

 limited, design for motorboat of, 858 

 square, for confined waters, definition of, 393 

 variable, first statement, 483 

 variations, estimated, with variable weights, 481 

 Drag, air, of ships, estimating, 274 



and resistance with wind on bow, 281 

 appendage(s), abreast, modifications in, 293 

 classification by type, 290 

 effect of wake velocities, 292 

 coeff(s), for abovewater hulls and upper works, 279 

 submerged bodies, 322 



typical 2-diml and 3-diml geometric bodies, 

 291 

 graphs, typical, for hydrofoils, 73, 74 

 confined-water, design for reduction, 661 

 cylinders, ellipsoids, and spheres, 291 

 data for bodies like appendages, 291 

 holes, slots, and gaps, 294 



