A28-1146-102-00
Radar Facts
5-15
D The antenna size used on the aircraft alters the best tilt settings by
about 1_. However, tilt management is the same for either size, as
shown in figure 5-16.
10-IN. ANTENNA
HAS 10 BEAM
12-IN. ANTENNA
HAS 7.9 BEAM
18-IN. ANTENNA
HAS 5.6 BEAM
24-IN. ANTENNA
HAS 4.2 BEAM
Antenna Size and Impact on Tilt Management
Figure 5-16
NOTE: A 10-inch antenna is shown for illustration purposes only.
D Someoftherulesofthumbare describedbelow andshown infigure
5-17.
- A 1_ look down angle looks down 100 ft per mile
- Bottom of beam is 1/2 beam width below tilt setting
- A 12-inch antenna grazes the ground at 100 NM if set to 0_ tilt
at 40,000 ft.
AD-35702@
TILT
BEAM WIDTH
Rules of Thumb
Figure 5-17
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