962 



HYDRODYNAMICS IN SHIP DESIGN 



Inclined, waterlines on sailing j'achts, data on, 784 

 Increased, draft with ship age, comments, 566 



resistance, limiting depth for 2 per cent, 404 

 Increasing the power and speed of an existing ship, 387 

 Index, cavitation, definition and use of, 10, 11 



roughness, factors in, 114 

 Induced flow in sorewprop jets, 343 



velocities in screwprop jets, data on, 343 

 Induction openings, positioning of for wavegoing, 701 

 Ink trail on ship model in circ-water channel, 138, 139 

 Inlet and discharge openings for heat exchangers, design, 

 701 



openings, multi-vane type, 702 



underwater, positioning to remain submerged, 701 

 Inner hull of submarine, definition and use of, 810 

 Installation, galvanic-action protectors, 704 

 Interdependence of motorboat hull-design features, 843 

 Interference effects, between blade sections in cascade, 84 



wave, general rules for, 243 

 Intermediate speed ratio in shallow water, graphs of, 394 

 Internal passages, friction data for water flow, 105 



shearing stresses in water along ships, 94 

 Interpretation, ready-made ship-design requirements, 454 



streamline traces and tufts, on ship models, 250-255 



wake diagrams, 3-diml, at sorewprop positions, 362 

 Isotachyls around an ellipsoid midsection, 45 



J-class sailing yachts, reference to lines drawings of, 228 

 Japanese fishing boats, illustrations of, 771, 772 



-vessel standard series, 300 

 Jenney fins, to prevent air leakage to propellers, 748 

 Jet(s), diameters, screwprop, ratio of inflow-outflow, 342 

 variation of with thrust-load coefficient, 343 

 outflow, augment of velocity at rudder positions, 707 

 axial and rotational velocity components in, 260 

 position of multiple rudders relative to, 708 

 outlines for screwprops, inflow and outflow, 343 

 -propulsion, gas or hquid, data on, 337 

 hydraulic, data on, 337 



design notes on, 648 

 pump-, data on, 337 



design notes on, 648 

 Joukowski airfoil sections, drag data for, 84 



Keel(s), bilge-, area, 692 



design diagrams, 692, 693 

 of, 691, 692, 694 

 for ABC ship, 695 

 discontinuous, on liner Oranje, 692 

 gaps and offsets between sections, 692 

 structural considerations in design, 694 

 traces by flow streamlines, 692 

 transverse shape and section, 694 

 deep, of a motorboat, 842 

 docking, design of, 695 

 sketches, 697 

 vertical bossings as, 686 

 drag, design of hull with, 543 

 drift-resisting, design of, 695 

 resting, design of, 695 

 roll-resisting, design of for ABC ship, 695 

 in parallel (abreast) and in tandem, 692 

 position, type, number, 691 

 Kelvin wave system, modified by E. Hogner, 161 



Kinematic viscosity, reference data on, 94 



values of for water, 919, 920 

 Knuckles, abovewater, design of, 560 

 Koch added-mass data for confined water, 434 

 Kort nozzle, definition sketch and design references, 687 

 Kramer's contours of ideal efficienc}', 614 



Lackenby friction-resistance formula, 104 

 Lag of bow-wave crest, graph for, 245 

 Lagally Theorem, description of, 68 



references on, 71 

 Laminar-sublayer thickness, in turbulent flow, 104, 120 



variation with i-distance and speed, 105 

 Landing and beaching, vessels designed for, 808 

 Landweber local-friction-resistance formula, 102 

 Lap and Troost friction-resistance formula, 104 

 Laps and butts, shaping and facing of, 740, 741 

 Lateral wind drag, 285 



moments and hull angles, 285 

 Launches, fast, design of, 752 

 Layer, boundary; see Boundary 

 LCB, usual fore-and-aft positions of, 486 

 Leading edge(s) of appendages, design of, 675, 676 

 Leakage, air, to screwprops, avoiding, 631 



separation zones, 140 

 Leeway, estimated, due to wind, 286 

 Length and long'l curvature in shallow-water design, 665 



-balance ratio, control surface, 721, 727 



-beam ratio for ships, 470 

 planing craft, 838 



ship, first approx, 465 



trochoidal wave, tables of, 165-168 



waterline, first approx, 464 



wave, to wave height, ratios in ship design, 170 



wetted, of planing forms, 268 

 Lerbs' 1954 screwprop design method, for ABC ship, 611 



summary of steps, 630 

 Level, change of with speed, 325 

 Life-saving or rescue boats, 816 

 Lift, -coefficient data for symmetrical hj'drofoil, 151 

 graphs, typical, for hydrofoils, 73, 74 

 product, for sorewprop blade sections, 617-619 



data for bodies hke appendages, 291 



-drag ratios for airfoils and hs'drofoils, refs on, 76 



dynamic, bibliography on, 269-271 

 determination of, 264 

 quantitative data on, 263 

 self-propelled motorboat models with, 864 



hydrofoil, formulas for calculating, 72 



spanwise distribution of, 83 

 Lifting fittings, recessed, design of, 743 



-surface correction factor, for sorewprop, 619 

 Light-load condition, estimated flow pattern in, 256 

 Lightships, or light vessels, design notes for, 814 

 Limen, of a rough surface, 112, 114 

 Limitations, present, of mathematical methods, 2 

 Limits for wavegoing conditions, 458 

 Line(s), choice of parent form for, 488 



faired, use of formulas for, 203 



fairing by mathematical methods, 199 



hull, preparation for model tests, 566 



layout, ABC planing-type tender, 843 

 round-bottom tender, 855 



of constant pressure derived analytically, 218 



