Electric Propulsion of Ships

This paper deals with the electric propulsion of practically all classes of vessels. The several types of electric drive are treated, in general, with special emphasis on Diesel-electric drive, as it is believed that this type of electric drive will be of most general interest, particularly to the inland section of our country, since it is especially applicable to the smaller size vessels, such as are used on rivers and lakes, to vessels in the coastwise trade and to the usual size of ocean freighter. All types of propelling equipment, however, will be referred to for the purpose of comparing the advantages of electric drive with other methods of ship propulsion and to show the natural advantages of each particular system. It is the intent of this paper to provide data valuable in the selection of the proper type of drive for each application, which must necessarily be determined by the character of the vessel and the service it is to render. Each type referred to has a particular field in which it is best suited. The authors desire to give credit to the Westinghouse and General Electric Companies for much of the data and material for cuts included in this paper.