This being true, however strange it may seem, only one electric machine is needed to do the work of the dynamo and the motor; for when it is connected to the shaft of the engine it will generate a current for charging the storage battery, and this is done while the craft is afloat; or it will develop power to drive the propellers when it is connected to the storage battery, and this is done when the submarine is cruising undersea.
CHAPTER V
MAKING AND SHOOTING THE TORPEDO
Full Instructions and Working Drawings for Making a Model Torpedo. How a Real Torpedo is Made, Directed, Shot and Explodes
CHAPTER V
MAKING AND SHOOTING THE TORPEDO
The submarine is first, last, and all the time an engine of death and destruction. Even in the earliest underwater experiments, you will remember, it was fitted with a bomb the sole purpose of which was to blow the enemy ship to atoms.