ENGINE No. 1. 



Simple Non- Condensing. 



Kind of engine Four-valve (Corliss) 



Number of cylinders 1 



/ Diameter of cylinder 23 in. 



Diameter of piston-rod 3i in. 



Stroke of piston 5 ft. 



Clearance 2* % 



H. P. constant for 1 Ib. m. e. p. one revolution per min. .1247 



Inside diameter of steam pipe 7 in. 



Inside diameter of exhaust pipe 8 in. 



Condition of valves and pistons regarding leakage . . . Practically tight 



Data and Results of Feed-Water Test, Engine No. 1. 



Character of steam Ordinary 



Duration 5.75 hrs. 



Weight of feed-water consumed 48,741 Ibs. 



Feed-water consumed per hour 8,477 Ibs. 



Pressure in steam pipe above atm 72.3 Ibs. 



Mean effective pressure 33.08 Ibs. 



Revolutions per minute 74.7 



Indicated horse-power 305.2 H. P. 



Feed-water consumed per I. H. P. per hour 27.77 Ibs. 



Measurements based on Sample Diagrams. 



Initial pressure above atmosphere 72.8 Ibs. 



Steam-pipe pressure above atmosphere 73.6 Ibs. 



Cut-off pressure above zero 66.5 Ibs. 



Release pressure above zero 24.3 Ibs. 



Mean effective pressure 33.12 Ibs. 



Back pressure at mid stroke above atmosphere 2.8 Ibs. 



Proportion of stroke completed at cut-off .367 



Steam accounted for at cut-off 23.32 Ibs. 



Steam accounted for at release 23.66 Ibs. 



Proportion accounted for at cut-off .84 



Proportion accounted for at release .852 



Engine No. 1 is supplied with steam in part from a number of 

 vertical boilers, and in part from a single boiler of the horizontal 

 return tubular type. The mixed steam showed no superheat- 

 ing, though probably commercially dry. The valves and pistons 

 were all fairly tight. The load consisted of cotton machinery. 



On another occasion two tests were made on this engine, the 

 first with ordinary steam as above, and the second with super- 

 heated steam, the horizontal boiler in the latter case being out 

 of service. The principal data and results were as follows : 



45 



