The people's war book; history, cyclopaedia and chronology of the great world war . cushioning effect upon the sound waves. While wespeak of sound waves, and can measure their am-plitude in some cases, there is no bodily displacementof the medium through which they travel. In generalthe harder, denser and more incompressible the me-dium, the more efficient the transmission of thesound waves. The underwater listening devices whichare so frequently availed of in submarines and pa-trol boats and destroyers used to attack them, con-sist primarily of a large diaphragm or its equivalentin some other
The people's war book; history, cyclopaedia and chronology of the great world war . cushioning effect upon the sound waves. While wespeak of sound waves, and can measure their am-plitude in some cases, there is no bodily displacementof the medium through which they travel. In generalthe harder, denser and more incompressible the me-dium, the more efficient the transmission of thesound waves. The underwater listening devices whichare so frequently availed of in submarines and pa-trol boats and destroyers used to attack them, con-sist primarily of a large diaphragm or its equivalentin some other physical form. DETAILS OF THE LIBERTY ENGINE. In May, 1918, the war department authorized thefollowing description of the Liberty engine, gener-ally accepted as one of the few really remarkableinventions brought out In the course of the war: Cylinders—The designers of the cylinders for theLiberty engine followed the practice used in the Ger-man Mercedes, English Rolls-Royce, French Lorraine-Dietrich and Italian Isotta Fraschini before the war FACTS, STORIES AND INCIDENTS 375. Supersubmarine Deutschknd which arrived at Bahimore after a trip across the Atlantic. and during the war. The cylinders are made ofsteel inner shell surrounded by pressed steel waterjackets. The Packard Company by long experimenthad developed a method of applying these steel waterjackets. The valve cages are drop forgings welded into thecylinder head. The principal departure from Euro-pean practice is in the location of the holding downflange, which is several inches above the mouth ofthe cylinder, and the unique method of manufactureevolved by the Ford Company. Cam Shaft and Valve Mechanism Above CylinderHeads—The design of the above is based on theMercedes, but was improved for automatic lubrica-tion without wasting oil by the Packard Motor CarCompany. Cam Shaft Drive—The cam shaft drive was copiedalmost entirely from the Hall-Scott motor; in fact,several of the gears used in the first sample engi
Size: 2105px × 1187px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectworldwar19141918
