72 



SUBJECT INDEX 



Heating water, by mixing with steam or hot 

 water, 219 



High-frequency square-wave generator, R-201 



High frequency vibrations, recorded by scratch 

 process, T-l 3 



High seas, tests during, T-26 



High-speed displacement boats, model, 1 53 



High-speed photography, time-recording device 

 for, R-3T8; T-l 54 

 Schlieren method, for recording explosion 

 phenomena, T-l 21 , T-l 56 



High-speed spark camera, T-207, T-213 



High-speed towable target. See Target, high- 

 speed towable. 



High-voltage d-c power supply, regulated, 561 



Hip roof, pressure distribution on, T-ll6 



Holland Model Basin, variable-pressure water 

 tunnel of, T-98 



Horsepower. See Effective horsepower; Shaft 

 horsepower. 



Hot-wire methods for velocity measurements in 

 water, 592 



H.S.V.A. See Hamburg Model Basin. 



HUGHES (DD410), noise survey of, full-scale, 

 R-10 



Hull, amphibian, tests for, model, 159 

 design of, in relation to frictional re- 

 sistance, model, 117 

 interaction with propeller, model, 470 

 seaplane, model, 5, 11, 16, 39, 46, 47, 51 , 

 70, 79. 89, 90, 92 to 95, 97 to 99, 102, 

 104, 107, 111, 120, 138, 139, 150, 154, 

 157, 161, 164, 165, 171, 175, 177, 182, 

 188, 192, 197, 202, 209, 211, 213, 215 

 to 218, 221, 223, 229 to 237, 239 to 

 242, 244 to 246, 248, 249, 253, 255, 

 257, 258, 274, 279, 300, 302, 306, 308, 

 310, 311, 313, 314, 320, 321, 324 to 

 326, 330, 335, 337, 342, 343, 346, 351, 

 352, 355, 368, 373, 376, 377, 38o, 381, 

 388, 389, 391, 401, 405, 407, 409 to 

 412, 4l6, 417, ^20, 423, 425 to 427, 

 431, 432, 434, 439, 443, 448, 455, 456, 

 46l, 462, 464 

 See also Sea-sled, 

 structure of, Impact loads on, full-scale, 

 488 

 service strains on, full-scale, 467 



Hull (Continued) 



vibration of, frequency of, 582 

 full-scale, 263; R-294 

 model, 382 [T-7], 395 

 Hull forms, of minimum resistance, T-69 

 Hydraulic flow, turbulent, T-l 73 

 Hydrodynaraic forces on anchor cable, R-317 

 Hydrodynamic increase in mass, in oscillating 



bodies, T-118 

 Hydrodynamic noise, development of hot-wire 



methods for velocity measurements in 



water, 592 

 Hydrofoils, hydrodynamic characteristics of, 



341 

 Hydroplane. See Hydrofoils. 

 Hydrostatic tests, of steam valves from ex- 

 German Destroyers Z-37 and Z-39, 596 

 Hydrovane Wing T, model experiments for, 25, 



34 

 Hydrovanes, experiments on seaplanes with 



and without, 80 



Illustrations, preparation of, R-128 

 Impact, effect of, 48l , 572 

 measurement of, R-246 

 on free-edge plates, 488 

 Impact waves, in water, measurements of, T-213 

 Impedance method, solution of vibration prob- 

 lems by, R-226 

 Inconel, modulus of elasticity of, R-l6 

 Index of technical information, miscellaneous, 



R-211 

 Indexing, time-saving method of, R-277 

 Induced current, in a-c meter disk, T-130 

 Instructions, for preparation of correspondence 

 by duplicating process, R-356 

 for preparation of illustrations, R-128 

 for preparation of technical reports, R-220 

 for typing and layout of reports and trans- 

 lations, R-225 

 Insulation, against sound, T-99 

 Insulators, rigging, fiberglas micarta, tensile 

 tests of, 593 

 rigging, porcelain, tensile tests of, 587 

 Integration, by means of dynamical analogues, 



R-140 

 Integrator, for ship calculations, T-l 24 

 Internal combustion engines, entropy diagrams 

 for, T-94 



