. Elements of transportation, a discussion of steam railroad electric railway, and ocean and inland water transportation . Thk of thk C,-uxaki) Link. LargesiL :>\i\[> ailoai lu iiHH).Length, 790 feet. Breadth, 88 feet. Gross register, 32,500 , 68,000 horse-power. * is 790 feet, and they are 88 feet in breadth. They have aspeed of over 25 knots an hour. Their engines, which areturl)ines, develop G8,000 horse power, 92 times the powerof the first Cunarder. The Three General Problems of Steamship Improvement.—To (l(V(h)p the ocean steamship of to-day out of the firstc
. Elements of transportation, a discussion of steam railroad electric railway, and ocean and inland water transportation . Thk of thk C,-uxaki) Link. LargesiL :>\i\[> ailoai lu iiHH).Length, 790 feet. Breadth, 88 feet. Gross register, 32,500 , 68,000 horse-power. * is 790 feet, and they are 88 feet in breadth. They have aspeed of over 25 knots an hour. Their engines, which areturl)ines, develop G8,000 horse power, 92 times the powerof the first Cunarder. The Three General Problems of Steamship Improvement.—To (l(V(h)p the ocean steamship of to-day out of the firstcrude steamshii)s rcMiuircd the solution of tliree generalmechanical i)rol)l(nis: {a) The efficient application ofpower, first by means of paddle wheels, later by means propellers; (h) the mechanical generation of power THE STEAMSHIP 209 ill tlu marine engine; and (c) tlie design and construc-tion of the ship so as to give it larger size and greaterbuoyancy and to increase its speed. It will be well to referbriefly to each of these general mechanical Double Bottom. Cross-section of the Lusitania. From Paddle Wheels to Propellers.—The first steamshipswere constructed of wood, and were driven by paddlewheels; it was not until after 1850 that the screw propellercame to be generally adopted in place of the side credit for the invention of the screw propeller belongsequally to John Ericsson (who later achieved great fame as 210 ELEMENTS OF TRANSPORTATION the architect of the first Monitor) and Francis P. Smith, anEnglish farmer. These men, each working in his own way,propelled a ship successfully with screws in 1836. Smithsship, the ArchimedeSy built in 1839, was so successful as toconvince builders of the practicability of the use of thescrew for the ocean service. The screw did not quickly displace the paddle wheel,because it was some years before the efficiency of the screw mmssm |^MjM|Mm«p|g|jjp Hk^^ i^^^^^S ^M;:;.^-«S^ • - ■■ niiiiii
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttranspo, bookyear1920
