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Rainhird Sprinkler Head Performance-ALFALFA-18 day cycle <br />rainbird 30 Q 40psi 011164" nozzle <br />8.3 gpm 92 ft dia <br />957227.62 sq inch <br />NUMBER OF SETS <br />32 NUMBER OF SPRINKLER HEADS (33-1) FOR A 128OFT SYS <br />6647 AREA OF SPRINKLER IN SQ-FT <br />144 CONVERSION TO SO-IN <br />15,315,642 SQ-INCHES IN A QUARTER MILE SYSTEM <br />OR <br />7 diameter of sideroll wheel <br />22.0 Circumference of side roll wheel (7ft dial <br />3 # of complete turns for new set <br />66.0 Distance Traveled <br />1280 Length of side roll being used <br />84444 Coverage- Sq-ft <br />144 conversion factor to sq-in <br />12,159,867 Coverage-Sq-in <br />22.5 hrs per sprinkler set to get 18days worth of gross water or net water <br />11205 gallon per set <br />231 cubic inch to gallon conversion <br />2,588,355 cubic inches of water per sprinkler <br />33 NUMBER OF SPRINKLER HEADS <br />85,415,715 total cubic inches of water per sideroll <br />7.02 inch of NET precipitation per sprinkler set(GOOD FOR 18DAYS) NEED 6.4 <br />0.31 inch of precipitation per hr <br />Morgan 0 sy <br />50.0.0 shares 33 <br />690.5 gpm <br />8.3 gpm per sprinkler head <br />832 sprinkler heads that can be operated <br />33.0 sprinkler heads per complete 1/4mile sideroll <br />- 2.5 quarter mile SR systems. <br />75% system efficiency <br />1.9 Net # of siderolls <br />33.0 shares per cis <br />20.1 shares of water per sideroll <br />1.16 acres per share of water <br />18.0 days cycle <br />432.0 Gross total hrs <br />' 71.0% management efficiency (5DAY OUT OF 7) <br />306.7 Net total hours <br />22.5 total hours to sprinkle enough inches of water to satisfy alafalfa for 18days <br />1.5 Down time to shut down side roll, drain, move, reconnect and startup <br />24.0 Total hours for a set <br />12.8 total moves in 18day cycle = net total hrs/total hours to sprinkle) <br />12 ROUND DOWN <br />23.3 acreage under side roll <br />F:\Erg\DATA\exdell\turf irrigation managmenh2007 WFC precipitation requirement from TIM 04FEB08.xls <br />20