TESTS OF DRAINAGE PUMPING PLANTS. 
33 
Table 24. — Tests of pumping plant in subdistrict No. 1, Lafourche drainage district 
No. 20, June 18-22, 191 7— Continued. 
TEST NO. 2, UNIT NO. 2. 
Time. 
Speed. Actual 
Discharge. 
Remarks. 
2.40..... 
R.p.m. Feet. 
184 5.00 
185 5. 15 
190 5.25 
191 ! 5.35 
190 ; 5.45 
190 5.55 
Sec.-ft. 
94.0 
94.1 
96.0 
96.2 
96.2 
G.p.m. 
42, 200 
42, 240 
43, 100 
43, 200 
43, 200 
3.00 
3.20 
From 3.16i p. m. to 4.16J p. m., 98.25 pounds of 
3.40 
4.00 
4.20 
Mean 
188.3 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 
5.54 
5.60 
5.74 
5.84 
6.07 
94.0 
97.9 
93.7 
90.1 
96.0 
42,220 
43, 950 
42, 100 
40, 460 
43, 100 
1 
5.79 
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. 
Mean 
speed. 
Mean discharge. 
Oil per 
hour. 
Water 
per 
pound 
of oil. 
Water 
per 
gallon 
of oil.i 
1 
Feet. 
4.35 
5.29 
5.79 
E.p.m. 
187.2 
Sec.-ft. G.p.m. 
100. 1 44.965 
Pounds. 
95.25 
98.25 
97.80 
Cubic feet. 
3,790 
3,700 
3,480 
Cubic fed. 
26, 630 
26, 000 
2 
188.3 ! 95.3 42,788 
189.4 
3 
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 means 
of a pump, and an overflow is arranged so that if the supply is too 
great the oil will flow back to a tank located in the foundation of the 
building. 
The average lift of the pumps is approximately 3 feet and the 
greatest lift about 6 feet. The usual variation of the water level on 
