SUBJECT INDEX 



977 



Ultxa-high-speed displacement-typo craft, design of, 754 

 Unbalanced propdev torque, disadvantages, 579 

 Under-the-bottom anchor installation, 558 



screw propellers, 653 

 Underwater exhaust for propelling machinery, 545, 565 



form, molding a new, 488 



hull, detail design of, 504 

 profile, 506 



ship smoothness and fairness, 749 

 Unequal power distr in multiple props, design to avoid, 573 

 Units of measurement, abbreviations for, 912 



in English sj'stem, 926 



ratios between English and metric, 926 

 Unsteady motion; see Motion 

 Unsymmetrical single-screw stern, design of, 528 

 Upper works, air-flow diagrams for, 276 



drag coefficients for, 279 



shaping and positioning, 561 

 Useful data for analysis and comparison, 926 

 Utility-boat design, round-bottom, example, 858 



Vanes, contra-; see Contra- 



Vapor pressure of water, 146, 147, 921, 922 



Variable draft, first approx, 483 



-load conditions, screwprop submersion and trim in, 



498 

 -weight conditions, buoyancy, stability, weight data, 

 499 



probable, first approx, 463 

 second statement of, 482 

 selected incUned WL's for, 499 

 Variation(s), attitude of planing craft with speed, 329 

 estimated draft for ABC ship, with variable weights, 



481 

 forces and moments throughout screwprop revolution, 



348 

 from normal hulls for shallow-water running, 666 



paddlewheel design, 648 

 geometric, of ship forms, 204 

 model residuary resistance with speed, 306-308 

 parallel-middlebody, resistance data, 306 

 pitch with radius of screwprop, 598 

 pressure, along a Rankine lissoneoid, 208 

 rate of, model resistance with speed, 306 

 resistance with speed-length quotient, 308 

 on planing forms, 269 

 trim, weight, and volume, 310 

 rise-of-fioor, in planing craft, 836 

 section coefficient along length, 517 

 thrust-and torque per revolution for screwprops, 348 



-load coefficient with speed, 344-346 

 total resistance with T,, 308-310 

 wake, systematic, use of, 572 

 wind force with heel angle, 285 

 velocity with height, 274 

 Vectors, wake, determined on models, 874 

 Vee entrance, pressure distribution along, 48 

 Velocity and pressure diagrams around bodies, 31 

 2- and 3-diml bodies, 43 

 distribution around body of revolution, 40 

 hydrofoil, 80 

 schematic ship forms, 47 

 asj'mmetrio body, 43 

 ship forms, prediction of, 257 



Velocity, and pressure fields around a hydrofoil, 82 

 distr around 2-diinl and 3-diml bodies, 44 

 around body, determination of by flow net, 24 

 special forms, 40 



2-diml stream forms, graphic determination of, 57 

 axial-, distr in screwprop inflow-outflow jets, 343 

 distribution around schematic ship forms, 47 



on hydrofoil, 80 

 fields around a hydrofoil, 82 

 induced, in screwprop jets, data on, 343 

 liquid, determination of around any body, 24 

 orbital, in trochoidal waves, 162, 166, 168, 169 

 potential, expression, formulation of, 214 

 formulas for typical 2-diml flows, 17 

 3-diml flows, 20 

 pressure, and force of natural wind, 284 



relationships in potential flow, 25, 26 

 profiles in ship boundary layers, list of references, 98 



typical, 97 

 ratios and pressure coefficients, tables of, 27, 30 

 trochoidal waves, tables of, 165-168 

 wake, effect on appendage drag, 292 

 wind, increase of with height, 274 

 Vertical and transverse thrust, design of devices to produce, 

 654 

 bossings as docking keels, 686 

 center of buoyancy position, by Normand formula, 479 



gravit}^ position, estimated, 479 

 drive for screw propellers, 653 

 thrust, design of devices to produce, 654 

 Vessels ; see specific kinds and types 

 Vibrating bodies and vortex streets, 141 



geometric shape, comparison to vibrating ellipsoid, 423 

 screwprop(s), estimated added-mass coeffs for, 436 



modes of motion, 437 

 ship hull, comparison with vibrating elHpsoid, 423 

 estimated added-mass coefficients for, 433 

 Vibration, characteristics considered in design, 580, 598 

 frequencies, relation of hull and propeller, 580 

 hull, in motorboats, 859 

 of ship appendages, avoidance of, 700 

 partial bibliography on, 439 

 prevention of on screwprops, 636 

 problem in shallow water, handling, 673 

 resonant, Strouhal number in, 143 

 Vibratory forces induced by propeller, 877 

 Virtual-mass coefficient, 418, 419 

 Viscosity, dynamic, and surface tension, 920 

 reference data on, 94 

 kinematic, reference data on, 94 

 values for water, 919, 920 

 various fiquids and gases, tables of, 919-922 

 Viscous flow; see Flow 



Volimie, bulk, calculation for a submerged body, 322 

 definition and description of, 454 

 distribution, tentative, for ABC ship, 498 

 -Froude number, definition of, 11 

 hull, first estimate, 471 



of submarine pressure hull, discussion of, 457 

 second approx for ABC sliip, 497 

 "standard" fresh and salt water, 915 

 Von Karman friction-resistance formula, 103 

 Vortex(es), hub, predicting, 155 

 motion, reference data on, 133 



