. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . ue- .^ ih / ^ IS105 / ^ y 400 MO 800 1000 reoo Revolutions Per Minute 1400 leoo 1800 Fig. 31—Theoretical Horsepower Curves at Uniform Torque which it was operated. Under these conditions horsepower and torque curves would be straight lines as shownin Fig. 31. The falling off or lowering of the torque abovecertam engine speeds results in a horsepower at suchspeeds less than that proportional to the speed, A gas-oline engine of
. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . ue- .^ ih / ^ IS105 / ^ y 400 MO 800 1000 reoo Revolutions Per Minute 1400 leoo 1800 Fig. 31—Theoretical Horsepower Curves at Uniform Torque which it was operated. Under these conditions horsepower and torque curves would be straight lines as shownin Fig. 31. The falling off or lowering of the torque abovecertam engine speeds results in a horsepower at suchspeeds less than that proportional to the speed, A gas-oline engine of the medium speed class, which delivered23 horsepower at 800 probably would deliver only43 horsepower at 1,600 ; that is, doubling the speeddoes not double the horsepower. This is illustrated in Methods of Cooling Cooling motor truck engines is usually accomplished bycirculating water, although air-cooled engines have beenproduced. Considering water-cooled engines only, the cyl-inders are so desigiied that water may be circulatedaround the outside of the cylinder proper in a jacket. ^Radmfor /Wo-ter Connections fo/ Top of Radio for ^/ Jackets. ^afer Connectionsfo bottom of Radiator Fig. 33—Cooling System This water-jacket is usually cast integralinder proper, although in some instances it with the cyl-has been made GENERAL SPECIFICATIONS 561 separate and either bolted, riveted or welded to the cyl-inder. Inasmuch as the valves are subjected to the greatesttemperatures, cylinder castings are usually arranged sothat the water-jacket extends around or partly aroundthe pockets where the valves are located. This cooling water is circulated either by the thermo-syphon system or by a power-driven pump. In thethermo-syphon the circulation of the water is caused bythe difference in temperature in the two parts of thecooling system (engine and radiator) in much the sameway as v/ater is circulated in residential water beatingsystems. The forced circulation system e
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjecthoistingmachinery
