TESTS OF DBAINAGE PUMPING PLANTS. 



39 



Table 32 gives the result of a test on high-lift unit No. 2 before the 

 blades of the pump were smoothed and sharpened. Table 33 gives 

 the results of a test after the improvements had been made. It was 

 believed that a considerably better showing would be obtained from 

 the low-lift pump by sharpening the impeller blades and trimming 

 out the casing, and this work was subsequently done. The results 

 of the test on low-lift unit No. 3 are given in Table 34. 



Table 32. — Test of pump No. 2 of drainage pumping plant at Port Arthur, Tex. 



23-26, 1918. 1 



July 



Time. 



Speed. 



Discharge. 



V 



Actual 

 Uft. 



Fuel 

 used. 



Water 



pumped 



per gallon 



of fuel 



used. 



2.56: 



R. p. m. 

 255 

 255 

 255 

 254 

 254 

 254 

 252 

 252 

 250 

 244 

 239 

 237 



Sec.-ft. 

 89.12 

 88.68 

 88.23 

 87.56 

 85.56 

 86.01 

 85.34 

 84.00 

 81.10 

 78.65 

 71.30 

 58.87 



G. p. 771. 



40,000 

 39,800 

 39,600 

 39,300 

 38,400 

 38,600 

 38, 300 

 37,700 

 36,400 

 35, 300 

 32,000 

 26,200 



Feet. 

 4.75 

 4.95 

 5.15 

 5.38 

 5.60 

 5.75 

 6.05 

 6.68 

 7.18 

 8.64 

 10.10 

 11.34 



G. p. m. 



Gallons. 



3.00 



0.139 

 .166 

 .164 

 .156 

 .163 

 .175 

 .159 

 .180 

 .210 

 .213 

 .210 



286, 000 



3.05 



238 000 



3.09 



239 000 



3.15 



246 000 



3.19 



237' 000 



3.23i 



219 000 



3.32 



237 000 



3.37 



202,000 



3.45 



168 000 



3.49 



150 000 



3.53 



125 000 







1 This test was made W. P. Langworthy before pump blades were sharpened. 



Table 33. — Test of pump No. 2 of drainage pumping plant at Port Arthur, Tex., July 



23-26, 1918} 















Water 



Speed. 



Average 

 velocity 

 of flow. 



Discharge. 



Actual 

 Uft. 



Fuel 

 used. 



pumped 



per gallon 



of fuel 















used. 



R.p.m. 



Ft. per sec. 



Sec.-ft. 



G.p.m. 



Feet. 



G. p. m. 



Gallons. 



254 



6.04 



89.12 



40,000 



3.60 



0.153 



262,000 



255 



5.87 



86.45 



38,800 



3.75 



.156 



249,000 



253 



5.89 



86.67 



38,900 



3.88 



.156 



'249,000 



254 



6.09 



89. 57 



40,200 



3.97 



.151 



267,000 



253 



5.91 



87.12 



39, 100 



4.35 



.154 



254, 000 



253 



5.77 



85.11 



38,200 



4.40 



.154 



248,000 



253 



5.82 



85.78 



38,500 



4.48 



.149 



258, 000 



254 



:,. 85 



86.22 



38,700 



4.60 



.149 



260, 000 



253 



5.81 



86.56 



38,400 



4.70 



.159 



211,000 



252 



5.85 



86.22 



38,700 



5.00 



.164 



'230,000 



252 



5.70 



81.00 



37,700 



5. 18 



.164 



230,000 



252 



5.64 



83.33 



:;7, mo 



5.40 



.166 



22.",, IK HI 



252 



5.61 



82.88 



37,200 



5.60 



.173 



215. 000 



261 



:,. 1 1 



80.21 



36,000 



5. 82 



.173 



208.000 



249 



:,. 53 



81.55 



30 Mm 



6.45 



.180 



203 1100 



217 



5.51 



81.82 



30, 500 



6.70 



.180 



•20:',, 01 10 



246 



5. 18 



so. 65 



36.200 



7.10 



. h><) 



21 l.iimi 



243 



5.24 



77.31 



31,700 



7.65 



. L69 



205,000 



1 This test was made W, P. Langworthy af tei pump 1 -lades were sharpen- id. 



