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Distance above and below aircraft altitude that is illuminated by the flat-plate radiator during level flight with 0° tilt.
.
Respective low altitude situation, with the antenna adjusted for 2.8° up-tilt.
ELEVATION IN FEET
80,000 70,000 60,000 50,000
30,000 20,000 10,000 0
0 25 50 100
RANGE NAUTICAL MILES
010 20 30 40 50 60 70
80
RANGE NAUTICAL MILES
Volume 2 Flight Crew Operating Manual
GF1710_048a
Rev 2A, Apr 11, 2005
TILT MANAGEMENT (Cont’d)
The following figure gives the approximate tilt settings at which ground targets begin to be displayed on the image periphery for an 18-inch radiator. The range at which ground targets can be oberved is affected by the curvature of the earth, the distance from the aircraft to the horizon, and altitude above the ground. As the tilt control is rotated downward, ground targets first appear on the display at less than maximun range.
To find the ideal tilt angle after the aircraft is airborne, adjust the TILT control so that ground clutter does not interfere with viewing of weater targets. Usually, this can be done by tilting the antenna downward in 1° increments until ground targets begin to appear at the display periphery. Ground returns can be distinguished from strong storm cells by watching for closer ground tragets that are displayed.
When ground targets are displayed, move the tilt angle upward in 1° increments until the ground targets begin to disappear. Proper tilt adjustment is a pilot judgment, but typically the best tilt angle lies where ground targets are barely visible or just off the radar image.
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual Volume 2
TILT MANAGEMENT (Cont’d)
The figure gives the approximate tilt settings required for different altitudes and ranges. If the altitude changes or a different range is selected, adjust the tilt control as required to minimize ground returns.
GF1710_182
Volume 2 Flight Crew Operating Manual Rev 2A, Apr 11, 2005
TILT MANAGEMENT (Cont’d)
For more information on WX Radar, see manufacturer’s Manual A28.146.102.00.
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual Volume 2
The lightning sensor system is used to detect lightning. The LSS rotary knob is used to select the following functions:
OFF . Turns off the LSS.
ANNUNCIATION LX OFF
(If installed)
GF1710_049
GF1710_050
SAT .56GMAP TAT .40
T5.0
TGT
TAS 234
GSPD 345
SBY . Selects the LSS in standby mode. The data is inhibited, but LSS accumulates data.
SAT .56GMAP TAT .40
T5.0
TGT
TAS 234
GSPD 345
ANNUNCIATION
STBY
LX . LSS is fully operational and displays data on the MFD.
CLR/TST . LSS accumulated data is cleared from memory. After 3 seconds the test mode is initiated.
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