Nebraska Irrigation Catalog

Useful Information

Surveyor’s Measure 1 mile = 80 chains = 320 rods 1 mile = 1760 yards = 5280 feet 1 chain = 4 rods = 22 yards = 66 feet = 100 links 1 rod = 5.5 yards = 16.5 feet 1 link = 7.92 inches Linear

Flow gallons/min x 0.002228 = cu. ft/sec gallons/min x 0.13368 = cu. ft/min gallons/min x 8.0208 = cu. ft/hour gallons/min x 0.06308 = liters/sec gallons/min x 3.7848 = liters/min cu. ft/sec x 7.4805 = gallons/sec cu. ft/sec x 448.83 = gallons/min cu. ft/sec x 26929.9 = gallons/hour liters/min x 0.0005886 = cu. ft/sec liters/min x .004403 = gal/sec Rule of Thumb 450 gpm x 60 min = 1 acre-inch of water Pressure 1 pound/sq. inch = 2.31 feet of head 1 foot of head = 0.433 pounds/sq. inch 1 foot of water = 62.3554 pounds/sq. foot Power

A

millimeters x 0.03937 = inches centimeters x 0.3937 = inches meters x 39.37 = inches meters x 3.281 = feet meters x 1.0936 = yards inches x 25.4 = millimeters inches x 2.54 = centimeters inches x 0.0254 = meters feet x 0.3048 = meters yards x 0.9144 = meters miles x 5280 = feet Area sq. feet x 144 = sq. inches sq. yards x 9 = sq. feet acres x 4840 = sq. yards acres x 160 = sq. rods sq. miles x 640 = acres 1 acre = 43560 square feet Volume cu. feet x 1728 = cu. inches gallons (US) x 231 = cu. inches

B

C

D

gpm x total head (feet) 3960 x pump efficiency

horsepower =

E

gpm x total head (feet) 3690 x BHP to pump

pump efficiency =

Circles circumference of a circle = 3.1416 x diameter area of a circle = 3.1416 x radius 2 area of circle (sq. ft) = acres within a circle 43560 sq. ft Doubling pipe diameter quadruples capacity.

F

G

cu. yards x 27 = cu. feet cu. feet x 7.4805 = gallons cu. yards x 202 = gallons

2 π LR

R

1 2 60(903.2)rP

hours per revolution =

Nebraska Irrigation, Inc. H quarts x 32 = ounces gallons x 4 = quarts gallons x 3.785 = liters gallons x 0.00379 = cu. meters gallons x 0.833 = imperial gallons π = 3.1416 L = distance from pivot to last tower (ft) R 1 = center drive gearbox ratio R 2 = wheel drive gearbox ratio r = tire rolling radius P = % timer setting in decimal form Tire Size r acre-inches x 27154 = gallons acre-feet x 325851 = gallons

I

liters x 0.2642 = gallons liters x 1.057 = quarts liters x 2.113 = pints Weight gallons (U.S., water) x 8.3357 = pounds cu. feet (water) x 62.3554 = pounds

11 x 22.5 20.1 11.2 x 24 20.5 14.9 x 24 22.9 16.9 x 24 23.2

Temperature

5 9

ºC =

(ºF - 32)

J

9 5

ºF =

ºC + 32

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