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Ground Speed Formula
Course length
Formula
m (ft) x 60 seconds
Course time (seconds) x
16.7 m/minute (88 ft/minute)
Example 45.7 m (150 ft) x 60 seconds
19.7 seconds x 16.6 m/minute
(88 ft/minute)
Understanding the Effective Spray Pattern
Width
Note:
Sprayer pressure regulator: 2.8 bar (40 psi).
•
The narrow-spray pattern
machine is 122 cm (48 inches) wide.
Figure 38
Top view of the narrow-pattern-spray nozzle
1. Spray width = 122 cm (48
inches)
2. Nozzle
3. Spray angle = 120°
•
The wide-spray pattern
is 274 cm (108 inches) wide.
= Ground speed
kph (mph)
= 8.4 kph
(5.2 mph)
(Figure
38) on the
4. Spray distance = 36 cm
(14 inches)
5. Front of the machine
(Figure
39) on this machine
Top view of the wide-pattern-spray nozzles
1. Spray width = 274 cm (108
inches)
2. Nozzle
3. Spray angle = 120°
Testing the Sprayer Nozzle Discharge
Operator supplied equipment: Stop watch capable
of measuring ± 1/10 second and a container graduated
in 50 ml (1 fl oz) increments.
Note:
Ensure that the spray system is clean and
there is 1/2 tank of clean water.
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1.
Engage the parking brake and start the engine.
2.
Set the pump/tank agitation switch to the O
position.
3.
Pull the agitation lever rearward to start the tank
agitation.
4.
Place the throttle to the F
5.
Push the agitation control lever down to the O
position.
Note:
Shut off the agitation to ensure proper
spray pressure and distribution.
6.
Use the spray-pressure control to adjust the
sprayer-system pressure to 40 psi (2.8 bar).
Note:
The red and white nozzles installed on
this sprayer have a normal operating pressure
of 40 psi (2.8 bar).
7.
Align the graduated container under each nozzle
for 19.7 seconds.
36
Figure 39
4. Spray distance = 61 cm
(24 inches)
5. Distance between spray
nozzles = 66 cm (26
inches)
6. Front of the machine
position.
AST
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N
FF
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