. American engineer and railroad journal . locomotive boilers that are sonearly like them that we can logically apply the conclusionsto them, as they do not vary much from the good practice ofthe Company. It is essential that the fuel should not differmuch from the briquettes chosen by the Lyons these reservations the experiments of the Lyons Com-pany furnish accurate data that is applicable to very many CflSCS. The experiments have led to the following conclusions :With the ordinary arrangement of tubes, 185 in number, andwith a diameter of 2 in. on the outside, the evaporation o
. American engineer and railroad journal . locomotive boilers that are sonearly like them that we can logically apply the conclusionsto them, as they do not vary much from the good practice ofthe Company. It is essential that the fuel should not differmuch from the briquettes chosen by the Lyons these reservations the experiments of the Lyons Com-pany furnish accurate data that is applicable to very many CflSCS. The experiments have led to the following conclusions :With the ordinary arrangement of tubes, 185 in number, andwith a diameter of 2 in. on the outside, the evaporation of theboiler touches its highest point when the length runs from13 ft. 11 in. to 14 ft. 9 in., and that the utilization of fuel,naturally less with longer tubes, is nevertheless reducing the number of tubes the production of steamfalls off, but the economical utilization of the fuel remainsabout the same. The increase of the diameter of the tubes and the reductionof their number increases the production of steam, by giving. Fig. 7- THE MACALLAN VARIABLE EXHAUST on THE GREATEASTERN RAILWAY. a larger section for the escape of the products of combustionfrom the fire. The economical consumption of fuel is re-duced when the diameter is increased in consequence of areduction in the heating surface, but the advantages accruingfrom a more abundant production of steam justifies the useof tubes ranging in diameter from 2 in. to 2^ in. The Serve tubes give their maximum production of steam atlengths considerably less than that of the smooth tubes (6 in. to 8 ft. 2* in.). It is shown by a comparison of thedifferent results obtained with experiments with the Servetubes that it is possible to obtain with them the same evapora-tive efficiency and the same utilization of the fuel as with thesmooth tubes, and at the same time shorten the boiler, thusmaterially reducing the weight. Some locomotives on the Northern Railway have beenequipped with Serve tubes having an outside
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
