TESTS OF DRAINAGE PUMPING PLANTS. 



33 



Table 24. — Tests of pumping plant in subdistrict No. 1, Lafourche drainage district 

 No. 20, June 18-22, 1917— Continued. 



TEST NO. 2, UNIT NO. 2. 



Time. 



a „„„j Actual 

 S P eed - lift. 



Discharge. 



Remarks. 



2.40 



E.p.m. , Feet. 



184 5.00 



185 5- 15 



Sec.-ft. 

 94.0 

 94.1 

 96. 



G.p. m. 

 42,200 

 42, 240 

 43.100 





3.00 





3.20 



190 

 191 



190 

 190 



5.25 

 5.35 

 5.45 

 5. 55 



[From 3.16J p. m. to 4.16J p. m., 98.25 pounds of 



3.40 



96. 2 43. 200 



4.00 



96.2 



43, 200 





4.20 













Mean 



1S8.3 



5.29 



95.3 



42, 788 





TEST NO. 3, UNIT NO. 2. 



12.15 



12.35 



12.55 



1.25 



1.35 



Mean.. 



190 

 190 

 189 

 188 

 190 



5.54 

 5.60 

 5.74 

 5.84 

 6.07 



94.0 

 97.9 

 93.7 

 90.1 

 96.0 



5.79 



42, 220 

 43, 950 

 42,100 

 40, 460 

 43, 100 



94. 4 42, 366 



From 12:07:40 p.m. to 1:42 p.m., 153.7 pounds= 

 97.8 pounds per hour of fuel used. 



SUMMARY. 



Test. 



Mean 



actual 



lift. 



Feet. 

 4.35 

 5.29 

 5.79 



Mean 

 speed. 



Mean discharge. 



Oil per 

 hour. 



R.p.m. Sec.-ft. G.p.m. Pounds. 



187. 2 i 100. 1 44, 965 95. 25 



188. 3 I 95. 3 42, 788 I 98. 25 



189. 4 1 94. 4 I 42, 366 ] 97. 80 



Water 



per 

 pound 

 of oil. 



Cubic feet. 

 3,790 

 3,700 

 3,480 



Water 



per 

 gallon 

 of oil .i 



Cubic fed. 

 26, 630 

 26, 000 

 24, 460 



1 Based on 36° oil=7.03 pounds per gallon. 



TEST OF PUMPING PLANT IN SUBDISTRICT NO. 1, LAFOURCHE DRAINAGE DISTRICT 



NO. 12, RACELAND, LA. 



DESCRIPTION OF PLANT. 



This plant was designed to pump water from 835 acres. It consists 

 of duplicate pumping units, each having a 24-inch double-suction 

 centrifugal pump connected by means of a clutch to a 14.5 by 21 

 inch 4-cycle engine. The suction openings on the pumps are 18 

 inches in diameter. The intake and suction pipes have been tapered 

 and enlarged so that the area of the intake and the area of the dis- 

 charge are considerably greater than the area of the discharge nozzle 

 of the pump. Engine ignition is by means of a hot bulb at the end 

 of the cylinder. Oil is forced into the combustion chamber by menus 

 of a pump, and an overflow is arranged so that if the supply is too 

 great the oil will Mow hack to a tank located in the foundation of the 



building. 



The average lift, of the pumps is approximately 3 feel and the 

 greatest lift, aboui 6 feet. The usual variation of the water level on 



