ENGINE No. 6. 



Simple Condensing. 



Kind of engine Four-valve (Corliss) 



Number of cylinders 2 



Diameter of each cylinder ... 26 in. 



Diameter of each piston rod 3f in. 



Stroke of each piston . . 5 ft. 



Clearance 3 % 



H. P. Constant for one Ib. m. e. p. one rev. per minute, .3254 



Inside diameter of steam pipe* 8 in. 



Inside diameter of exhaust pipe 10 in. 



Condition of valves and pistons regarding leakage . . . Some leakage. 



Data and Results of Feed-Water Test, Engine No. 6. 



Character of steam Ordinary 



Duration 5.08 hrs. 



Weight of feed-water consumed 71,150 Ibs. 



Feed-water consumed per hour 14,006 Ibs. 



Pressure in steam pipe 84.4 Ibs. 



Vacuum in condenser 27.3 in. 



Mean effective pressure 36.73 Ibs. 



Revolutions per minute 61.1 



Indicated horse-power 610.74 H. P. 



Feed-water consumed per I. H. P. per hour 22.95 Ibs. 



Measurements based on Sample Diagrams. 



THKEE 



KM.S 



COJfDKN-IN',. 



Nox- 



CONDKNSIM. 

 EM>. 



Initial pressure above atmosphere . 



Cut-off pressure above zero 



Release pressure above zero 



Mean effective pressure 



Back pressure at mid stroke, above or be- 

 low atmosphere 



Proportion of stroke completed at cut-off . 



Steam accounted for at cut-off .... 



Steam accounted for at release .... 



Proportion accounted for at cut-off (aver- 

 age for whole engine 



Proportion accounted for at release (aver- 



Ibs. 

 Ibs. 

 Ibs. 

 Ibs. 



Ibs. 

 Ibs. 



77.3 

 74.6 

 17.2 

 39.46 



10.2 



.233 

 15.81 

 15.56 



76. 

 73.8 

 20.4 

 30.03 



-f 4.5 



.271 

 22.12 

 22.63 



.757 

 .754 



Engine No. 6 has a pair of cylinders exhausting into a jet 

 condenser with direct-connected air-pump. One cylinder was 



58 



