104 



SUBJECT INDEX 



Shipboard Fighter BS1 , experiments with model 



of, 33 

 Shipbuilding, theory of elasticity in, T-2 



theory of strength in, T-1 7 

 Shock. See Impact; Shell shock. 

 Shock displacement gages, 5^3 

 Shock gage, reed, design of, 654 

 reed, performance, 603 

 theoretical study of, 61 3 

 Shock measurement, T-1 41 

 instruments for, 5^3, 720 



evaluation of, 720 

 with ball-crusher gage, 75" 1 

 with crystal accelerometer, R-246 

 ifith reed gage , 603 

 Shock motion, response of system of single 



degree of freedom to, 61 3 

 Shock pressure tube, for pressure gage 



calibration, 753 

 Shock testing machine, motions and stresses 



in, 536 

 Shock waves, in air, photography of, 525 



in liquids and solids, propagation of, T-1 39 

 in water, measurements of, T-21 3 



photographic study of, R-77, R-203 

 protection against, R-49 

 Silver-plating, Brashear process, R-267 

 Similitude, laws of, in model tests, T-1 94 

 SIMON BOLIVAR, propulsion data for, model, T-6f 



tests on, model, T-67 

 Singing of ship propellers, T-1 23 

 Singularities, method of, for determination of 

 forces and moments on a body in poten- 

 tial flow, T-241 

 Sink. See Source-sink. 

 Sinkage of ships in canals, 601 

 Sinkage of ships in shallow water, model, 64-0 

 Six-component dynamometer, for testing ship 



appendages, 692 

 Skeg, effect of on resistance of high-speed 

 target, 641 

 on WASHINGTON (BB56), natural frequency of, 

 full-scale, R-22 

 Skin friction, 193, 227, 267, 275, 333 



effect of roughness on, 729 

 Slip stream. See Plow. 



Slotted tensile specimens, study of, 622; 

 R-243, R-271 



Slow-motion camera, T-1 49 



Smooth-bottom hull, comparative tests of, 



model, 669 

 Sonar dome, forces and moments on, measurement 

 of, model, 692 

 pressure distribution on, 606 

 Sound, insulation against, T-99 



underwater. See Underwater sound. 

 Sound dome. See Sonar dome. 

 Sound waves, anomalies in propagation of, T-41 

 Source-sink envelope, of a torpedo form, 27"! 

 SOUTH DAKOTA (BB57), vibration in propelling 



machinery, 5^7 

 Spark camera, high-speed, T-207, T-21 3 

 Spark-flash apparatus, AEG, T-1 90 

 Sparks, electric, brilliance and duration of, 



T-1 6l 

 Spectacle frames, effect of, on propulsion, 256 

 Speed, uniform, of streamlined falling body, 



R-42 

 Speed data, for NEW MEXICO (BB40), full-scale 



and model, R-1 39 

 Speed meter, for airplane catapult, 126 

 Sperry roll and pitch recorder, 11 6 

 Spherical shell, elastic theory of, T-238 

 Square-wave generator, R-201 

 SR-4 strain gage. See Strain gage, wire- 



resistance . 

 Stability, dynamic, of midget submarine, German 

 V-80, from wind-tunnel tests, T-227 

 elastic, of tee stiffeners, 4-57 

 of body falling through fluid, R-42 

 of ships, method of determining, T-202 

 of stiffened plates, 402 [T-8] 

 of trawler models, T-75 

 Stability on course, theory of, T-180 

 Stability problems, in compressed plates, T-79 

 in thin cylindrical shells, T-33 

 treatment of, T-73 

 Stability tests, on current-indicator buoys, 



model, 667 

 Stabilization, of C0NTE DI SAV0IA, power cost 

 of, full-scale, 430 

 of cylinder towed through fluid, R-68 

 of ships, full-scale, T-44 

 by vanes, model, R-1 30 

 Standardization trials, on BLACK FALCON, full- 

 scale, 344 



