TM-5-3740-210-12
(3) Calculate work rate (acres/minute) as follows:
Acres/minute = .002 x forward speed (mph) x swath width (feet).
Acres/minute = .002 x 100 mph x 300 feet
Acres/minute = 60
(4) Determine the flow rate (gpm) required as follows:
(Step 1) x (Step 3)
=
Gallons/minute gallons/acre x acres/minute
Gallons/minute = 1.0 x 60 = 60
(5) Divide the flow rate by the number of nozzles to be placed on the
system to derive gallons per minute, per nozzle. (Assume 30 nozzles
for the purposes of this example).
gallons/minute per nozzle = 60 gallons/minute = 2.0
30 nozzles
minute per nozzle and install with uniform spacing along the spray
boom.
(7) With a known liquid quantity in the tank, flight test the system with
the windmill blade pitch angle setting at 1.5 and record the pressure
obtained at the flight speed previously selected. Increase the blade
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