The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

‘i HE diesel engine is now so ; i well known that a description at this time would seem super- fluous. Therefore, this paper will be limited to the application of the diesel engine to marine propulsion. It was originally developed for stationary purposes. Such great success was met that licenses were sold by the original developers, the Augsburg Co., of Germany, to a number of other firms in foreign countries. Among these may be mentioned the American Diesel Engine Co., the Nobel Co., Petrograd, and the Burmeister & Wain Co., Copenhagen. The Amer- ican company limited itself to build- ing stationary engines. The Nobel company was the pioneer in applying these engines . to marine purposes. Long before oil en- gines were used on ships ih other countries, the Nobels had a fleet of diesel - engined ships in operation in Russia: <The Burmeister & Wain Co. has been very successful in applying its heavy four -cycle, single- acting engines to merchant vessels, as will be shown later. From the iY Y in several countries almost simultan- eously took up the development of the diesel engine for propelling submarines. In the United States, the Electric Boat Co. was the first to build marine diesel engines. These were of the four- cycle single-acting type. In England, a very similar type was built for sub- marines, by Vickers, Ltd. In _ Ger- many, the government inaugurated a country-wide competition. As a re- ' sult of this the Nuremberg branch of the Maschinenfabrik Augsburg-Nurn- berg, A. G, developed a_ two-cycle single-acting engine. The Augsburg Co. developed a four-cycle, single- acting engine. The Krupps developed a two-cycle single acting engine. From this development may be traced A Dpaseoal Discussion of the Various Factors Which Have Promoted and Retarded the Application of the Diesel Engine to Marine Propulsion the engine, which has been taken o by other builders and applied to large merchant vessels. During the past four years, interest in this engine | has spread, so that in practically all i the leading countries of the world there are large firms engaged in the development or manufacture of marine diesel engines. While there is now a very great variety, when it comes to details and arrangements, all these engines may be classified as mult: | cylinder, single-acting; some operat- ing on the two-stroke and others on the four-stroke cycle. Approximately 300 vessels, of which over half are submarines, ate fitted with these engines and are running successfully, A. further develop- ment, yet in its infancy, is the double - acting two- cycle engine. Prior to the present | European war, the Nuremberg company had been working for over four years on a_ six - cylinder double - acting two- above brief sketch, there can be traced a direct line of de- scent of present-day marine diesel en- pines from. the original four-cycle, single -acting sta- tionary engine. A special application of the diesel en- gine to marine pur- poses is to be found in submarines. These vessels were at first fitted with gasoline engines. In certain instances steam has been used. Firms Presented at the 1915 meeting of the Inter- national Engineering Congress. Cra Shaft Carn Shafi Carn Warer Jack er SECTION OF TWO-CYCLE ENGINE 232 chant ship, At the outbreak of _ the war, these engines were _ installed in the ship and trials were in progress: There are certaif limitations to the size of diesel et gines which may be advantageously 4?" — plied to marine propulsion. The — smallest engine which can well be é Working Piston cycle engine of 12; J iy a ee Oyhinder 000 horsepower. =f} - scavenger Piston This engine was Sen D Scavenger Cylinder Suction Valve reported t60. ame All » E Scavenger Cylinder Discharge Valve , WI) x been completed last | S F scavenger Frece/ver . eee Pe [ G Scavenger Valve summer. The firm e Lesa | FH Merking Grinder of Blohm & Voss “i Piaf 2 Sevenger ar mpe Hamburg, had #8? \ iis K Lxhaust Forts built and success: N | \ i | L Lxhavst Pipe fully tested a palt W/ WA rh M fve/ Spray Valve of 1,000-horse Ni a) Al N Connecting Rod power, two-cycle, oni aye ob —— | Ss ne gines for a T U WwW