SUBJECT INDEX 



979 



Wave(s), conditions, tentative, for ship design, 172 

 crest, bow, estimate of height and poaition, 244 



lag abaft stem, 245 

 deep-water, comparison with shallow water, 180 

 diverging, effect on drag, 220 

 earthquake, or tsunami, 181 

 geometric, references to, 182 

 height(s), and steepness ratios for design purposes, 169 



bow and stern, predicted, 244 



to wave length ratios for ship design, 170 

 interference along a ship, general rules for, 243 

 Kelvin system, 161 



lengths, in deep and shallow water, 182, 183 

 miscellaneous, general data for, 181 

 ocean, stereoscopic photo of, 179 



typical profiles, 178 

 patterns around 2-diml forms, 39 



on water surface, theoretical, 160 

 profile(s), alongside models, 241 



observed on models, 873 



of ocean waves, from stereo photos, 180 



ship, typical, 239 



sketching, for new design, 494 



synthetic, 3-component, complex sea, 175 



surface, prediction of, 246 



transom-stern ABC ship, 495 



trochoidal, 163, 164 



typical, for ships, 239 

 relations, analytic ship-, 217 



to natural wind, 176 

 resistance calculations, ship forms for, 219 

 shallow-water, comparison with deep-water, 180 



data on, 181 

 ship, data on, 160 



simple and standard, for design purposes, 171 

 sinusoidal, formulas and ordinates for, 170 

 -speed, ratio in shallow water, definition of, 395 

 speed, solitary, for shallow water, 661 



tables of, 165-168 

 steepness ratios encountered at sea, 169 

 stern-, estimate of height and position, 245 

 subsurface, bibhography on, 185 

 surface, theoretical, data on, 160 

 systems, Kelvin, modified by Hogner, 161 



tentative "standard", for design and evaluation, 

 172 

 transverse, effect on drag, 220 

 trochoidal, definition drawing, 162 



elevation and slopes of, 163, 164 



length-velocity-period relations, 165-168 



orbit radii, change with depth, 169 



orbital velocity in deep water, 162, 166, 168, 169 



sketch of slopes, 164 



summary of theory, 161 



tables of lengths, periods, velocities, 165-168 

 tsunami or earthquake, 181 

 velocities in deep and shallow water, 180-182 

 wind, patterns and profiles by modern methods, 177 



tabulated data, 175 

 Zimmermann, definition and use of, 176, 177 

 Wavegoing, abovewater hull proportions for, 496 

 conditions, limits for, 458 

 freeboard for, 548 

 model tests, 877 



Wavegoing, requirements in ship design, 449 

 Wavemaking, pressure resistance due to calculation of, 210 

 resistance, calculation of, 215 



comparison of calculated and experimental, 217 

 due to diverging and transverse waves, 220 

 tabulation of typical components, 216 

 Weber number, definition and use of, 16 

 Wedge-type trim-control device on planing craft, 840 

 Weight(s), balance, longitudinal, first approx, 497, 498 

 for light draft, 500 

 conditions, variable-, 463 

 estimate, first, for a ship, 463 

 planing craft, 828 

 round-bottom motorboat, 853 

 second, for planing-hull motorboat, 831 

 third, for motorboats, 863 

 estimating procedure for motorboat, 828 

 heavy, longitudinal position in a planing craft, 850 

 principal, second estimate, 474 

 specific, definition of, 5 

 -speed-power factors for average vessels, 383 



small craft, 824, 832, 853 

 "standard" fresh and salt water, 915 

 Weitbrecht equivalent sand roughness values, 114 

 Welding fillets, use of for fairing, 742 

 Wetted area of a hydrofoil, definition of, 5 

 length of planing forms, 268 

 surface; see Surface 

 Wheel, paddle; see Paddlewheel 



propeller; see Propeller 

 Wheelock wave, definition and use of, 169, 170 

 Width, blade-, of screwprops, 340 



cavitation diagrams for selecting, 605 

 design of, 605 

 Wigleys (W. C. S.) design rules for bulb bows, 510 

 Wind, drag, and resistance, with wind on bow, 281 

 coefficients for ship types, 280 

 irregular structures, formulas for, 276 

 lateral, 285 



masts, spars, rigging, reducing, 566 

 -effect calculations, examples for ABC ship, 282, 285 



capsizing moments, 286 

 force, velocity, and pressure, nominal, 284 

 friction resistance of hull, comments on, 280 

 moments, lateral, and heel angles, 285 

 natural, surface-water currents due to, 287 

 force, velocity and pressure of, 284 

 relation to waves, 176 

 pressure, location of center of, 284, 285 



magnitude of, 283 

 resistance, 322 



and CP layout for ABC ship, 283 

 model(s), and testing, notes on, 278 



typical, 277 

 of motorboats, 862 

 of ships, estimating, 274, 322 

 prediction for ABC ship, 282 

 still-air, 278 



tests, bibliography of, 278 

 with wind on bow, 281, 282 

 velocitj', increase with height above water surface, 



274-276 

 velocities and Beaufort scale of U. S. Navy Dept, 284 

 wave(s), patterns and profiles by modern methods, 177 



