Transcript Aircraft Drift Control Dennis R. Gardisser ftp.uaex.edu

Aircraft Drift Control
ftp.uaex.edu
Dennis R. Gardisser
Major Issues With Ag Aviation
• Droplet size
• Aerodynamic droplet lifting – propwash,
vortices, ground effects, obstructions
• Positive boom shut off
• Operator skill and operating techniques
Results in Eight Times
the Number of Droplets
Cutting
Droplet Size in
Half
500
Microns
=
250
Microns
2 more droplets
fill in the sphere
0.125 Orifice,30 Deflector
0
700
20psi
40psi
60psi
20psi
40psi
16
60psi
14
600
12
500
400
8
300
6
200
4
100
2
0
0
100
110
120
130
MPH
140
150
160
V<100µm
DV0.5
10
0 deflector, 40psi
0
0.061
0.078
0.125
0.171
0.061
0.078
0.125
600
0.171
14
12
500
10
8
300
6
200
4
100
2
0
0
100
110
120
130
mph
140
150
160
V<100µm
DV0.5
400
Drop Boom Concept
Flow Sensor
Flow Controller
Straight stream nozzles
Electrostatics on Aircraft
Ayres 660 Thrush