. American engineer and railroad journal . zed with the fourblasts for each revolution of the driving wheels than it is withthe two blasts of the two-cylinder compound locomotive. Hencethe coal consumption is somewhat less and the steaming quali-ties of the boiler improved, especially at high speeds. 2. In comparison with the four-cylinder locomotives of theGlehu system the arrangement of the parts will be found to bevery much simpler, since there is a saving of two complete setsof valve motions, and the two cylinders being cast in one pitcegreatly simplifies the work of construction. Thetende
. American engineer and railroad journal . zed with the fourblasts for each revolution of the driving wheels than it is withthe two blasts of the two-cylinder compound locomotive. Hencethe coal consumption is somewhat less and the steaming quali-ties of the boiler improved, especially at high speeds. 2. In comparison with the four-cylinder locomotives of theGlehu system the arrangement of the parts will be found to bevery much simpler, since there is a saving of two complete setsof valve motions, and the two cylinders being cast in one pitcegreatly simplifies the work of construction. Thetendency of the main axle to bend is greater than in theGlehn svstem. solonga^the working pressure of the outside pstonis not taken up bv the side rods, and transferred to a pair ot trailingwheels. But whpn the locomotive is hard at work and a pair oftrailing wheels are used, which is the case in most instances, thetendency to bend will not be essentially increased bv the pistonpressure. In any case, however, the tendency is less than in loco-. Fi?. 3. Fig. 5. motives having two inside cylinders since the tractive power ofthose similarly located upon this locomotive is considerably the great tendency of the driving wheels of lhe6e enginesto twist and pound at high sppeds are taken into consideration,the difference s must become still less. The use of nickel steel inthese axles has reu Jred them perfectly safe. In engines withsix wheels coupled the front axle can be driven by the inside cyl-inders and the second by the outside, and thus a correspondingdistribution of this tendency be obtained. The working parts of the inside cylinders are as easy of accessas the outside, because the outside cylinders are not in the wayand the cross connections are between the frames. The construc-tion of the frames is much simpler, which, being on the Ameri-can plan, can be quickly disconnected from the cylinders. On account of the i uportant equalization of the opposite forces,at work upon
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
