99 



SUBJECT INDEX 



Spark camera, high-speed, T-207, T-213 



Spark-flash apparatus, AEG, T-1 90 



Sparks, electric, brilliance and duration of, 



T-l6l 

 Spectacle frames, effect of, on propulsion, 256 

 Speed, uniform, of streamlined falling body, R-U2 

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



and model, R-139 

 Speed meter, for airplane catapult, 126 

 Sperry roll and pitch recorder, ^^6 

 Spring-hammer box. See Hammer box, spring. 

 Square-wave generator, R-201 

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



resistance. 

 Stability, dynamic, of midget submarine, German 

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

 elastic, of tee stiff eners, U57 

 of body falling through fluid, R-i|2 

 of ships, method of determining, T-202 

 of stiffened platss, U02 [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 CONTE DI SAVOIA, power cost 

 of, full-scale, U30 

 of cylinder towed through fluid, R-68 

 of ships, full-scale, l-kk 

 by vanes, model, R-1 30 

 Standardization trials, on BLACK FALCON, full- 

 scale, 3^^t 

 on CLAIRTON, reduction of data from, full- 

 scale, 317 

 on COLORADO (BBl^J), full-scale, 1 40 

 on DAHLGREN (DDT 87), full-scale, R-338 

 on destroyers, full-scale, T9 



full-scale and model, 28 

 on LSM458, full-scale and model, 678 

 on MARYLAND (BBl|6), full-scale, llO 

 on minesweeper, German EMS-1 , full- 

 scale, 6U9 

 on SANTA ROSA, full-scale, 363 

 on WEST VIRGINIA (BBll8), full-scale, 1 i+O 

 on-WORDEN (DD352) , full-scale and model, 103 

 Static load, on elastic structures, 507 



Steel, cladded and uncladded, vreld test of, 642 

 for lightweight machine tools, T-1 01 

 furniture. See Furniture steel, 

 high-tensile, plastic strain and deflection 



tests on, R-1 42 

 medium, brittle failure of, R-207, R-265 



plastic strain and deflection tests on, 503; 

 R-1 42 

 modulus of elasticity of, 31 8 

 plastic behavior of, R-1 42, R-243 

 resistance of, to shock loads, R-30 

 special-treatment, plastic strain and deflec- 

 tion tests on, R-1 42 

 welding of, 642; R-123, R-249 

 structural, toughness of, 622 

 See also Iron. 

 Steel plates. See Plates. 

 Steel welding, of models, R-347 

 Steering, of SALINAS (A019), full-scale, 350 

 of ships, effect of thrust direction and posi- 

 tion on, model, R-21 6 

 theory of, T-55, T-180 

 twin-screw ship, model, 331 

 Steering control, of ex-German Submarine um , 

 full-scale, 41 

 of submarine, cruiser, model, 86 

 fleet, model, 115 

 German, model, 64 

 mine -laying, model, 101 

 03-10 Class, model, R-1 36 

 1750-ton, model, R-1 37 

 1600-ton, model, R-1 34, R-1 35 

 R1 -20 Class, model, 112 

 S3, model, 17; R-1 33 

 S48-51 and 159-162 Class, model, R-1 38 

 SSI 63-1 71 Class, model, 20, 26 

 VI -3 Class, model, 130 

 V5-6 Class, model, 128 

 Steering gear data. See also Tactical data. 

 Steering maneuvers, investigation of ships on, 



T-42 

 Stepped-type hull, comparative tests of, model. 

 Steps, longitudinal location of, on model, 435 



pointed, in airplane floats, model, 438 

 Stereophotogrammetry, vrave research by, T-204 

 Stiffeners, effect of, on plates, T-31 , T-78 

 strength of, 452 



