ENGINE No. 5. 



Simple Condensing. 



Kind of engine . Four-valve (Corliss) 



Number of cylinders 2 



Diameter of each cylinder 82.5 ins. 



Diameter of each piston-rod ... 4 5 ins. 



Stroke of each piston 4.5 ft. 



Clearance 3 % 



H.P. Constant for one Ib. M.E.P. one rev. per min. . . .4484 



Inside diameter of steam-pipe 7 ins. 



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



Data and Results of Feed- Water Test, Engine No. 5. 



Character of steam . Ordinary 



Duration . 5.55 hrs. 



Weight of feed-water consumed 100,253 Ibs. 



Feed-water consumed per hour 18,063 Ibs. 



Pressure in steam pipe : . . 71.1 Ibs. 



Vacuum in condenser 26.2 in. 



Mean effective pressure 32.41 Ibs. 



Revolutions per minute 47.3 



Indicated horse-power 687.39 H. P. 



Feed-water consumed per I. H. P. per hour ...... 26.28 Ibs. 



Measurements Based on Sample Diagrams. 



CONDENSING 

 CYLINDER. 



NON- 

 CONDENSING 

 CYLINDER. 



Initial pressure above atmosphere . . . Ibs. 



Cut-off pressure above zero Ibs. 



Release pressure above zero / Ibs. 



Mean effective pressure Ibs. 



Back pressure at mid-stroke, above or be- 

 low atmosphere Ibs. 



Proportion of stroke completed at cut-off . 



Steam accounted for at cut-off .... Ibs. 



Steam accounted for at release. .... Ibs. 



Proportion accounted for at cut-off (aver- 

 age for whole engine) 



Proportion accounted for at release . 



70.3 

 63.5 

 20.1 

 39.54 



-9.4 



.298 

 16.78 

 17.36 



65.2 

 63. 



20. 

 26.2 



+ 4.9 



.308 

 24.47 

 25.39 



.784 

 .813 



Engine No. 5 lias a pair of cylinders, one of which exhausts 

 into a jet condenser, with direct-connected air-pump, and the 

 other is non-condensing. Steam is furnished from cylinder 



55 



