75 



SUBJECT INDEX 



ORANJE, design of, model, T-128 

 Orientation, of suspended body, R-37 

 Oscillating bodies, hydrodynaraic increase in 



mass in, T-ll8 

 Oscillations, measurement of, in high seas, 

 T-26 

 of gas globes in underwater explosions, 



T-209 

 relaxation, 564 



self-excited, entrainment of, T-l 70 

 Oscillator, sweep, 483 

 Oscillograph, electrographic, T-151 

 Oscillograph loops, T-1 5 2 



Paddlewheels, model tests with, 176 



Pallograph, T-l 76 



Panama Canal, restricted channel tests for, 



579 

 Paraffin models versus wooden models, 319 

 Parametric excitation, 558 

 Paravanes, 533 

 Passenger lines, rolling experiments on, 



model , 7 

 PATOKA (A09), rudders of, model, 268 

 steering tests on model of, R-216 

 Patrol vessels, diesel engines for, 501 



EAGLE Class, moment of wind on, model, 15 

 Pendulum oscillations, forced, T-192 

 PENSACOLA (CA24), rolling of, full-scale, 



316 

 turret foundation of, full-scale, design 



of, 207 

 Periscope, submarine, wake of, model, R-152 

 Periscope tubes, modulus of elasticity of 



materials for, R-l6 

 PHOENIX (CL46), noise survey of, full-scale, 



service strain on, full-scale, 467, ^68 

 Photoelectric time-interval meter, for in- 

 stantaneous velocity measurements, 

 R-214 

 Photogrammetry, wave research by, T-204 

 Photographic methods, for determining angle 

 of heel, full-scale and model, 397 

 for obtaining launching data, full-scale, 



R-50 , 

 for printing templates, R-313 

 for recording behavior of steel diaphragms, 

 R-66 



Photographic study, of flow about an airfoil, 

 model, 557 

 of gas globe under water, 512 

 of underwater explosions, 520; R-39. R-65 

 of underwater shock waves, R-77, R-203 

 Photography, high-speed, R-3l8; T-190 

 high-speed, for recording explosion phe- 

 nomena, T-121 

 schlieren method, T-121, T-156 

 time-recording device for, R-318; T-154 

 Photolith printing method, T-l 38 

 Photomechanical printing, T-43 

 Piezoelectric gage, 523; R-157 



calibration of, R-244, R-246, R-248, R-269 

 Piezoelectric measuring method, in ballistics, 



T-120 

 Pitch recorder, calibration of, 11 6 

 Pitching experiments, on cruiser, model, 4 

 Pitot tube, cylindrical, T-l 72 

 spherical, T-l 72 



13-hole, operation of, 583 

 Planing float, design and performance of, model, 

 540 

 for supporting submerged loads, 573 

 used as astern-fueling float, R-366 

 Planing surfaces, curves for, R-80 

 Plastic behavior, of steel, R-243 

 Plastic deformation, of plate, under pressure, 

 490, 532; R-279, R-280 

 of steel, -medium, 503 

 Plastic sheets, stress-strain characteristics 



of, R-74 

 Plastic strain, of medium steel, 503 



tests of on steel plates, R-142 

 Plates, buckling of, T-31 , T-32, T-78 



circular, deformation of, under pressure, 



490, 532 

 compressed, stability problems of, T-79 

 deformation of, R-244, R-248, R-279. R-280 

 effect of joint eccentricity on strength of, 



440 

 ..effect of stlffeners on, 452; T-31, T-78 

 energy absorption of, R-248, R-280, R-296 

 flat, critical strength of, R-l 



tensile strength of, 446 

 free-edge, impact measurements on, 488 

 fused-quartz and plastic, resistance to under- 

 water explosions, R-296 



