The Submarine Torpedo Boat
Its Characteristics And Modern Development

INDEX 207 Development, future, 134 -----, in England, 20 -----, in France, 20 -----, in Germany, 22 Deviation of the compass erratic, 88 Diameter, tactical, 92 Diesel engine, theory of, 112 -----, difficulties in design, 116 -----, German types, 120 Difficulties in rapidly increasing sub- marines over their present size, 137 Diving type, characteristics of per- formance of, 46 -----, equilibrium forces of, 51 -----, impracticability of large boats of the, 48 Double hull type of construction, 22 d’Quevilley system of propulsion, 130 Dragging for submarines, 147 Drop keels, 108 Dual system of power plant, the limitations of the, 18 Dyson, Captain C. W., on propeller design, 77 E Eagle, attack on the British flag- ship, 2 Edison nickel-iron storage battery, 126 Effect of beam-length ratio upon resistance, 65 Effect of error in estimation of range, 162 Effect of error in the estimation of speed and course of enemy, 163 Effect of form upon resistance, 65 Effect of submarine on battleship design, 141 Effect of submarine on the strategy of blockade, 164 Effective torpedo range, limit of, 28, 162 Efficiency, tactical, 138 E. H. P., determination of, 68 Electric Boat Co., 18 Electro-contact mines, 198 Engines, Diesel, 112 -----, four cycle and two cycle, 115 ——, gasoline, no ——-, speed and power curves of, 75 steam, 128 English submarine activities, 154, 158 Entanglements for harbor defense, 150 Equilibrium of diving boats, 51 Equilibrium of “Even Keel” boats, 53 Estimation of power, by comparison, 77 -----, by independent method, 78 -----, by model basin testing, 67 Even keel submergence, 46, 53 Evolutions, tactical, of the subma- rine, 153 F F class, British, 20 Fenian Ram, Holland’s, 6 Fiab, San Giorgio Co., 188 Firing, angle method of, 161, 181 Firing, necessity for rapid, 32, 98 Firing, system of torpedo, 32, 97 Floating mines, 196 Form of hull, effect on resistance, 65 Form of superstructure, 105 Formulas, propeller, 75 Forward propellers, effect of, 54, 93 France, submarine development in, 20