970 



HYDRODYNAMICS IN SHIP DESIGN 



Resilient material in sorewprop tunnel roofs, 672 

 Resistance(s), air, of ships, estimating, 274 

 and drag with wind on bow, 281 

 appendage, calculation of, 288 

 for submarines, 295 



customary values, 2SS 

 augment of; see Thrust deduction 

 calculated, and experimental, comparison of, 216 



for planing craft, 848 



surface and submerged ships, 313 



of appendages, 288 



ship forms suitable for, 219 



theoretical, references on, 221 

 changes of, with changes in displacement and trim, 310 

 components, major, ratios of, 313 

 data, from model tests of typical ships, 297 



observed, for models and ships, 297 



parallel middlebody variations, 306 



systematic, from model series, 298 



typical shallow-water, 389, 390 



very fat ships, 303-306 

 low speeds, 306 

 deep-water, found from shallow-water data, 400 

 discontinuities, estimating, 294 

 due to flow in free-flooding spaces, 323 

 experimental and calculated, comparison of, 216 

 fouling, factors affecting, 117 



graphs of, 123, 124 

 friction; see Friction 

 hydrodynamic, of unusual forms, 3 

 increase, 2 per cent, Umiting depth for, 404 

 individual appendages, per cent, 289 

 kinds of for ships, summary, 313 

 large appendages, 295 

 limiting depth for 2 per cent increase, 404 

 overall, for appendages, 288 

 pressure, analytic methods of predicting, 321 



mathematic methods of calculating, 206 



modern developments in calculation of, 210 



of submerged bodies as function of depth, 323 

 rate of variation of residuary (for model), with speed, 



306 

 residuary, contours from TSS, 299 



prediction from Gertler data, 318 



Japanese fishing-vessel series, 300 

 TSS contours, 316, 317 



specific, from Gertler-TSS data, 302 



variation of with speed, 306-308 

 on planing forms, 269 

 shallow-water, found from deep-water data, 400 



predicting resistance by inspection, 408 



quantitative effect of in subcritical range, 390 

 ship, early efforts to calculate, 207 



in canal locks, predicting, 413, 414 



predicting fouling effects on, 120 



summarj- of kinds of, 313 

 slope, estimating, 321 

 specific, definition of, 5 

 -speed data, finding, for shallow water, 397, 400 



determination of O. Schlicting in shallow water, 

 definition diagram, 392 

 still-air and wind, 278, 322 

 subdivision into five types, 314 

 submerged bodies and ships, estimate of, 313 



Resistance, surface ship, estimate of, 313 

 Telfer's method of predicting, 318 

 tests on models, 872 



theoretical calcs of, reference material on, 221 

 torpedoboat, in shallow water, 390 

 total, and R-r/V"^ ratio for ABC ship model, 893 

 comparison of calculated and experimental, 217 

 estimated, for submerged and surface ships, 313 

 methods of approximating, 315 

 of model and ship, variation with T,, 308 

 per ton, for typical ships, 309 



variation of with speed, 308, 310 

 on planing forms, 269 

 subdivision into friction and residuary, 314 

 wavemaldng, calculation of, 215 



comparison of calculated and experimental, 216, 



217 

 due to diverging and transverse waves, 220 

 tabulation of typical components, 216 

 wind, and CP layout for ABC ship, 283 

 ship still-air, 322 

 bibhography of model tests, 278 

 -friction, of abovewater hull, 280 

 models and testing techniques. 278 

 motorboats, 862 

 of irregular structures, formulas for, 276 



ships, estimating, 274 

 prediction for ABC ship, 282 

 with wind on bow, 281 

 Response, rapid, to rudder action, design for, 711, 735 

 Resting keels, design of, 695 



Restricted and shallow waters; see Water(s), confined 

 Restrictions, lateral channel, in subcritical range, estimated 



effect, 410 

 Reversible features in propdev design, 578 



propellers, performance data on, 338 

 Revolution, body of, cavitation data for, 151 



velocity and pressure distribution around, 40 

 Reynolds number, blade-Reynolds and d-Reynolds, 15 

 calculation of, 15 

 tables of, 88-94 



x-Reynolds and 5-Reynolds, 15 

 Ridge-type straight deck, 554 

 Rigging, design to reduce wind drag, 566 

 Rise-of-floor magnitude for planing craft, 836 

 River steamers, typical, general data, 664, 665 



water-surface slopes and currents, 660 

 Roll-resisting keels ; see Keels 

 Rolling periods, estimated, for ABC ship, 497 

 Root fillets for screwprop blades, shaping, 606 

 Rotating-blade propeller; see Propeller (general classi- 

 fication) 

 Rotation, determining rate of, for screwprop, 597 



direction and rate in propdev and ship design, 572 

 Rotational vel components in screwprop outflow jet, 260 

 Rotative efficiency, relative, estimate of, 374 

 Rough-hull condition, estimated shaft power for, 385 

 Roughness, allowances, determination of, 115 

 plot of three types, 100 

 tentative individual, 117 

 drag variation along length, 739 

 equivalent sand, 113 



friction, allowances for, on flat surfaces, 115 

 index, factors in, 114 



