ENGINE No. 24. 



Simple Non- Condensing Engine. 



Kind of engine Single valve 



Number of cylinders 1 



Diameter of cylinder 14.5 ins. 



Diameter of piston rod 21 ins. 



Stroke of piston 13 ins. 



Clearance 12 % 



H. P. constant for 1 Ib. m. e. p. one revolution per min. .0107 HP. 



Inside diameter of steam pipe 5 ins. 



Condition of valves and piston regarding leakage . . . Fairly tight 



Data and Results of Feed- Water Test. 



Character of steam , Ordinary 



Duration 4.45 hrs. 



Weight of feed-water consumed 8,983 Ibs. 



Feed-water consumed per hour 2,018.6 Ibs. 



Pressure in steam pipe above atmosphere 80.3 Ibs. 



Mean effective pressure 23.22 Ibs. 



Revolutions per minute 248.4 



Indicated horse-power 61.7 I.H.P. 



Feed-water consumed per I. H. P. per hour 32.71 Ibs. 



Measurements based on Sample Diagrams. 



Initial pressure above atmosphere 78.4 Ibs. 



Corresponding steam-pipe pressure 80.5 Ibs. 



Cut-off pressure above zero 74. 1 Ibs. 



Release pressure above zero 29.6 Ibs. 



Mean effective pressure 23.43 Ibs. 



Back pressure at mid stroke above atmosphere 2.6 Ibs. 



Proportion of stroke completed at cut-off .211 



Steam accounted for at cut-off 21.66 Ibs. 



Steam accounted for at release 23.57 Ibs. 



Proportion of feed-water accounted for at cut-off .662 



Proportion of feed- water accounted for at release .721 



Engine No. 24 is of the high-speed type, with an unpacked 

 piston valve controlled by a shaft governor. Steam was sup- 

 plied from a horizontal return tubular boiler in what was 

 believed to be a commercially dry state. The valve was new, 

 well fitted, and fairly tight. The piston was also fairly tight. 

 The load consisted mainly of machinery for the manufacture of 

 woolen yarns. 



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