SUBJECT INDEX 



949 



Added mass of entrained liquid; see Mass 

 Adjustable features in propdev design, 578 



fins on raft Kon-Tiki, 698 

 Advance coefficient, calculation of for a screwprop, 613 

 Aeration of separation zones, 140 

 Afterbody buttocks, design of, 519 

 Air, and exhaust gases, mechanical properties of, 922 

 wind resistance of ships, estimated, 274 

 currents around superstructures, 561-563 

 entrainment, precautions against, 747 

 -flow pattern over ABC ship, estimated, 565 

 passenger-ship model, 563 

 test techniques on models, 563 

 leakage, to screwprop, avoiding, 631 



separation zones, 140 

 mechanical properties of, 915 

 resistance of ships, estimating, 274 

 velocitj', increase of with height above surface, 274 

 Airfoils, typical, test data from, 73 

 Airscrew propulsion, 658 

 Allowance(s), design and performance, 454 

 for ABC ship design, 456 

 estimated curvature, in friction-resist calcs, 110 

 for wake velocity on appendage drag, 292 

 powering, and reserves, graphic representation, 576, 

 577 



in ship design, 574 

 roughness; see Roughness 

 shadowing, for appendages in tandem, 292 

 specific fouling, graphs of, 123, 124 

 Alphabet, Greek, 900 



Alternative preliminary ship designs, preparation of,' 501 

 Amphibious craft, hydrodynamic design of, 806 

 Analogy, electric, bibliography on, 50 



delineation of flow patterns by, 49, 67 

 Analysis, diagram, for wake-survey data of ABC ship, 367 

 flow, abaft a screw propeller, 259 

 diagrams, 239 

 for arch type of stern, 525 

 hydrodynamic ship requirements, 460 

 model-test data on ABC ship, 879 

 observed flow at screwprop position, 259 

 principal requirements for motorboat, 826 

 ship-design, useful data for, 926 

 TMB 3-diml wake-survey diagram, 362 

 wake behind a ship, 261 

 wetted surface, 493 

 Analytical and mathematical methods, necessary im- 

 provements in, 219 

 of predicting pressure resistance, 321 

 ship-wave relations, 217 

 Anchor, installation, under-the-bow, proposed, 558 

 mushroom, proposed for ABC ship, 558, 559 

 recesses, design of, 556 

 Anchored ship, friction drag of, 128 

 Angle(s), blade-helix, of screwprops, 340, 341 

 control surface, neutral, setting of, 736 

 entrance, of designed waterline, 479 

 hydrodynamic pitch, /3j, first approx for screwprop, 

 615 



second approx, 616 

 neutral rudder, model tests for, 876 

 -of-attack and press coeff data for symm hydrofoil, 

 151 



Angle(s), trim, for planing craft, 840 

 "Angleworm" curves, description of, 303 



use of, 316 

 Anomalies, unexplained, in confined-water performance, 



414 

 "Antilift" developed by surface props, d(,'f and use of, 632 

 Aperture(s), and clcaranc-cM for propdevs, 537 

 gaps ahead of rudders, 712 

 propeller, shaping of hull adjacent to, 536 

 Appearance features of hull sheer line, 547 

 Appendage(s), abreast and in tandem, modifications in 

 drag for, 293 

 added-mass data for water surrounding, 438 

 and hull combinations, design of, 526 

 arch-stern ABC design, 681 

 cavitation on, occurrence of, 145 

 classification by type of drag, 290 

 design of control surfaces and, for motorboats, 862 

 displacement of, 295, 296 

 drag data for bodies representing, 291 



effect of wake velocity on, 292 

 fairing of, in general, 742 

 ferryboat, design of, 793 

 fixed, design of, 675 

 in tandem, shadowing allowances for, 292 



varjdng flow, 293 

 inception and effect of cavitation on, 145 

 large, resistance of, 295 

 lift data for bodies representing, 291 

 motorboat, design of, 842, 862 

 movable, design of, 706 

 resistance, calculation of, 288 

 for submarines, 295 

 individual, per cent, 289 

 overall, customary values, 288 

 scale-effect problems in connection with, 288 

 short, definition of, 108 

 tandem, resistance of, 292 

 use of flow diagrams for positioning, 258 

 vibration of, design to avoid, 700 

 Aquino wake-fraction formula, 368 

 Arch stern, ABC ship, afterbody plan, 523 

 appendages for, 681 

 type of single-screw stern, 521 

 flow analysis for, 525 

 Area(s), -balance ratio, of a control surface, 721 

 bilge-keel, 692 

 control-surface, determining by new procedure, 715 



first approx, for preliminary design, 713 

 curve, section-; see Section-area 

 maximum-, section, optimum longitudinal position of, 



482 

 paddlewheel blade, finding, 642 

 ratio(s) of screwprops, definitions of, 340 



expanded, finding, for new design, 602 

 rudder, determination of, 713-720 

 sail-, to wetted-surface ratio, for a yacht, 786 

 silhouette, of a ship above water, 277 

 wetted, of a hydrofoil, 5 

 Arm, strut; see Strut 



Arrangement, physical, of submarines, 810 

 Aspect ratio, data on effect of lifting surfaces with low, 866 

 effective, for fins and skegs, 698 

 ship hydrofoils, 83 



