ENGINE No. 27. 



Simple Non-Condensing Engine. 



Kind of engine Single valve 



Number of cylinders 1 



Diameter of cylinder 12 * ins. 



Diameter of piston rod 2* ins. 



Stroke of piston 20 ins. 



Clearance . 8 % 



H. P. constant for 1 Ib. in. e. p. one revolution per minute . . 01210 H. P. 

 Condition of valves and piston regarding leakage . . Considerable leakage 



Data and Results of Feed- Water Test. 



Character of steam < >rrtinary 



Duration 3.083 hrs. 



Weight of feed-water consumed 4,374.5 Ibs. 



Feed-water consumed per hour . . 1,418.0 Ibs. 



Pressure in steam pipe above atmosphere 72.-J Ibs. 



Mean effective pressure 18.15 Ibs. 



Revolutions per minute 17 _'.:; 



Indicated horse-power 38.1 I.H.P. 



Feed-water consumed per I. H. 1'. per hour 37.21 Ibs. 



Measurements based on Sample Diagrams. 



Initial pressure above atmosphere .... 08.8 Ibs. 



Corresponding steam-pipe pressure 72.2 Ibs. 



Cut-off pressure above zero 00.5 Ibs. 



Release pressure above zero 20.4 Ibs. 



Mean effective pressure .18.15 Ibs. 



Back pressure at mid stroke above atmosphere 3.5 Ibs. 



Proportion of stroke completed at cut-off .210 



Steam accounted for at cut-off 21.13 Ibs. 



Steam accounted for at release 2(5.74 Ibs. 



Proportion of feed- water accounted for at cut-off .508 



Proportion of feed-water accounted for at release .710 



Engine No. 27 is of the high-speed class, with unpacked 

 piston valve operated through a shaft governor. The boiler is 

 of the horizontal return tubular type. The leakage of the 

 engine was confined mainly to the valve. The load consisted 

 of machine tools. 



The engine being located at a distance of some 75 ft. from 

 the boiler, the condition of the steam was not so favorable for 

 economy as it might otherwise have been. Doubtless this ex- 

 plains in part the poor showing. 



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