APPLICATION RATE (gal/acre) PERFORMANCE OF THE UH 1 B/D
HELICOPTER SPRAY SYSTEM E'ITH DEFINED HERBICIDE AGENTS
(Fluid Temperature 65 F and Windmill pitch setting at 1. 0)
NOTE: 2510 and 2560 tips are furnished with each sprayer. When the 2510 tip
is used, application rate will be decreased approximately 33%. When the 2560
tip is used, application rate will be increased.
WHITE *
AGENT
BLUE
ORANGE
Nozzle
56 ea. 8355-1/4
56 ea. 8355-1/4
56 ea. 8355-1/4
Orifice
2530 Tip
2530 Tip
2530 Tip
Speed (knots)
50
70
90
50
70
90
50
70
90
Swath (ft)
90
95
100
100
120
140
90
to
120
Flight Ht.
GPA
GPA
GPA
GPA
GPA
GPA
GPA
GPA
GPA
12 ft.
3 1/4
3 1/8
3
2 1/2
2 1/4
2
1 1/2
to
1 1/4
25 ft.
3 1/4
3 1/8
3
2 1/2
2 1/4
2
1 1/2
to
1 1/4
50 ft.
3 1/4
3 1/8
3
2 1/2
2 1/4
2
1 1/2
to
1 1/4
*WHITE herbicide agent application performance is estimated only
4.4.2
Liquid Temperatures
Flow rate performance will vary with herbicide agent temperatures, particularly with ORANGE and WHITE
agents.
Thus the application rates derived above from tests may not be repeatable under colder or warmer
environments.
Application rates can be expected to decrease under cooler conditions and increase under warmer
conditions. It is essential that the system performance be measured in accordance with Section 4.2 and 4.3 of this
manual and adjustments made as required.
4.4.3
Compatibility of Agents
Flush completely with water when changing from BLUE to WHITE, or vice versa, otherwise a precipitate will form
which will clog the spray system. ORANGE is known to have some deleterious effect on certain kinds of rubber so that
frequent inspection of transfer hoses, seals and diaphragms will be required. ORANGE also will soften certain paints
with continued exposure and aircraft contamination should be held to a minimum.
29b
