TESTS OF DRAINAGE PUMPING PLANTS. 



11 



diameter of cylinder 14 inches, stroke 20 inches. Various speeds of 

 rotation were employed for the purpose of finding the best efficiency. 

 The results were excellent and have been confirmed by tests of other 

 plants. If the mechanical efficiency of the engine be assumed as 90 

 per cent and the efficiency of transmission 95 per cent, the efficiency 

 of the pump would be approximately 55 per cent with a 5-foot lift. 



Table 3. — Test 1 of Menge pump, Paradis, La., Sept. 16, 1909. 







Speed. 











Efficiency 



Boiler 

 pres- 



Indi- 

 cated 

 horse- 







Actual 

 lift. 



Discharge. 



Water 

 horse- 



ofengine, 



trans- 

 mission, 







sure. 



power. 



Engine. 



Pump. 









power. 



and 

 pump. 



Lbs. per 



















so. in. 





R. p. m. 



R. p. m. 



Feet. 



Sec.-ft. 



G. p. m. 





Per cent. 



76 



11.4 



67 



78 



2.67 



1.28 



575 



0.39 



3.4 



77 



39.6 



92 



98 



3.55 



39.6 



17, 800 



15.9 



40.2 



80 



40.1 



92 



99 



3.65 



39.6 



17, 800 



16.3 



40.6 



75 



59.6 



107 



117 



4.24 



54.5 



24, 500 



26.1 



43.8 



77 



22.1 



80 



87 



3.42 



20.8 



9,360 



8.0 



36.2 



79 



37.7 



93 



101 



3.90 



35.5 



15,970 



15.6 



41.4 



69 



59.3 



107 



116 



4.30 



53.7 



24, 150 



26.1 



44.0 



70 



41.7 



97 



104 



4.15 



37.9 



17, 050 



17.8 



42.7 



68 



65.8 



111 



121 



4.80 



52.0 



23, 400 



28.2 



42.8 



55 



48.4 



100 



111 



4.55 



42.8 



19,300 



22.0 



45.5 



55 



71.0 



114 



123 



5.00 



55.5 



25,000 



31.4 



44.2 



50 



65.3 



110 



122 



5.00 



54.5 



24, 500 



30.8 



47.1 



48 



60.6 



109 



118 



4.90 



51.2 



23,000 



28.4 



46.8 



70 



76.5 



116 



128 



5.30 



56.3 



25,350 



33.7 



44.1 



1 Duration of test, 3 hours 13 minutes. 

 TESTS OF PUMPING PLANT OF THE PHILLIPS LAND CO., PLAQUEMINES PARISH, LA. 



DESCRIPTION OP PLANT. 



This pumping plant is used to drain 2,500 acres of wet prairie 

 land in Plaquemines Parish, about 15 miles below New Orleans. 

 The plant consists of two units, a 36-inch double-suction centrifugal 

 pump driven by a 14 by 18 inch simple slide-valve engine, and a 

 24-inch double-suction centrifugal pump driven by a 10 by 14 inch 

 simple slide-valve engine. Both engines are noncondensing. The 

 suction pipes of the large pump are 26 inches in diameter, while those 

 «»f the smaller pump are 18 inches. The pumps are direct connected 

 to the engines through flexible couplings. The exhaust of the engines 

 j- conducted through a common exhaust pipe to a closed heater 

 and then to an exhaust head. Steam is furnished by two horizontal 

 return ttibuljir boilers rated at 80 horsepower each. Oil is used as 

 fuel. Steam La required to iitotni/e the oil and to run the oil and 

 boiler feed pumps. The pumping plant is housed in a steel frame 



building covered with galvanized iron. 



Mil HOD OP CONDUCTING THE PIR8T n i 



The plant was operated under normal conditions for the firs! i<'si. 

 Fuel vv ;i measured in ;t barrel. Peed water was measured by a 

 ?Vorthington meter, which whs calibrated after the test. No attempt 



