ENGINE No. 14. 



Simple Non- Condensing Engine. 



Kind of engine ... Single valve 



Number of cylinders ... 1 



Diameter of cylinder 8.5 in. 



Diameter of piston rod , II in. 



Stroke of piston 10 in. 



Clearance 8 % 



H. P. constant for 1 Ib. in. e. p. one revolution per min. . . .00:28 H.P. 



Inside diameter of steam pipe 2 in. 



Inside diameter of exhaust pipe 3* in. 



Condition of valves and piston regarding leakage . . Considerable leakage 



Data and Results of Feed- Water Test. 



Character of steam Ordinary 



Duration 2J hrs. 



Weight of feed-water consumed 2,357 Ibs. 



Feed-water consumed per hour 042.8 Ibs. 



Pressure In steam pipe above atmosphere 105.3 Ibs. 



Mean effective pressure 30.58 Ibs. 



Revolutions per minute ... 315 



Indicated horse-power 27.35 I. II. P. 



Feed-water consumed per I. H. P. per hour 34.44 Ibs. 



Measurements based on Sample Diagrams. 



Initial pressure above atmosphere 00.6 Ibs. 



Cut-off pressure above zero 92.5 Ibs. 



Release pressure above zero 34.1 Ibs. 



Mean effective pressure 30.58 Ibs. 



Back pressure at mid stroke above atmosphere 1.7 Ibs. 



Proportion of stroke completed at cut-off . 1 '. '4 



Steam accounted for at cut-off 17.92 Ibs. 



Steam accounted for at release 21.17 Ibs. 



Proportion accounted for at cut-off .52 



Proportion accounted for at release 615 



Engine No. 14 is of the high-speed class, controlled by a 

 shaft governor. It is provided with a piston valve which is 

 unpacked. Steam is supplied from a water-tube boiler, proba- 

 bly in a commercially dry condition. The piston was fairly 

 tight. The valve leaked badly. The load consisted of a dy- 

 namo furnishing current for electric lighting. 



The boiler plant in this case is the same as that of Engine 

 No. 13. 



The inferior economy exhibited here can be attributed in the 

 main to leakage. 



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