Goteborg Model Basin, electrical equipment of, 



T-175 

 Graphical solution, of 4-5° strain-rosette data, 



600 

 Graphs, preparation of, R-l 28 

 Gravity, effect of, on underwater gas globes, 



R-182 

 Great Lakes freighter, resistance tests of, 



model , 61 8 

 Grouting, use of dry mortar for, 538 

 Gun firing trials. See Firing tests. 

 Gun foundation, analysis of, R-l 27 

 on destroyers, full-scale, R-57 

 stress on, T-2 

 GUNARD, hull of, model, 165 

 Gunboat, river, model, 82 

 Gunfire, shock waves produced by, T-l 02 



HAMBURG Model Basin. See Model Basin, Hamburg 

 HAMILTON (DDlUl), propulsion tests on, full- 

 scale and model, 390 

 service strain, full-scale, 467 

 shaft bearings on, full-scale, 360 

 shaft bossing of, vibration of, full-scale, 



305 

 thrustmeters for, full-scale, 370 

 vibration data for, full-scale, 372 

 wind effects on, model, 312 

 HAMMANN (DD4-12), noise survey of, full-scale, 



R-12 

 Hand strain gage, 285, 292 

 Harness, safety, for aircraft pilots, strength 



of, 633 

 Hatch seal locks, explosion or blast tests on, 



T-l 91 

 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-1 3 

 High seas, tests during, T-26 

 High-speed displacement boats, model, 153 

 High-speed motion-picture camera, twenty-lens, 



R-345 

 High-speed photography. See Photography, 



high-speed. 

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

 High-speed towable target. See Target, high- 

 speed towing. 



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

 Hip roof, pressure distribution on, T-1 16 

 Homing device, for air-sea rescue work, 659 

 Hot plastic paint, effect on frictional resis- 

 tance , 789 

 Hot-wire measurements, theory of as a velocity 



meter, 724 

 Hot-wire method, for turbulence measurements 

 in water, 726 

 for velocity measurements in water, 592, 670 

 K.S.V.A, See Model Basin, Hamburg. 

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



R-10 

 Hull, amphibian, tests for, model, 159 

 Aquaflow, tests of, model, 669 

 design of, in relation to frictional resis- 

 tance, model, '1 1 7 

 impact loads on, full-scale, 4-88 

 interaction with propeller, model, 4-70 

 seaplane. See Seaplane hulls, 

 service strains on, full-scale, 467 

 smooth-bottom planing, tests of, model, 669 

 submarine. See Submarine hulls. 

 Hull forms, experimental boat, basic form, 

 model tests of, 740 

 experimental boat, Hacker form, model tests 

 of, 776 

 Scheme I, model tests of, 764 

 Scheme J, model tests of, 738 

 Scheme L, model tests of, 757 

 geometry of , 71 

 of minimum resistance, T-69 

 Hull vibration, calculation of flexural modes 

 of, 632, 706 

 calculation of frequency of, 582 

 full-scale, 263, 699, 762; R-294 

 model, 382 [T-7], 395 

 steady-state, calculated by digital process, 



715 

 theory of, 739 

 Huron-Eddy Hacker form aircraft rescue boat, 



model tests of, 776 

 Hydraulic flow, turbulent, T-1 73 

 Hydrodynamic flow, 485 

 Hydrodynamic forces, on anchor cable, R-317 



on stranded cables, 713 

 Hydrodynamic increase in mass, in oscillating 

 bodies, T-l 1 8 



