The “V” legend annunciates variable gain. Se-
lecting RCT, TGT, or GCR forces the system into
preset gain. Preset gain is not annunciated.
SLV
A dead front annunciator that is only used in
dual controller installations. With dual con-
trollers, one controller can be slaved to the
other by selecting OFF with the radar MODE
switch. This slaved condition is annunciated
with the SLV annunciator.
Note that both controllers must be off before
the radar system turns off.
LSS (Option)
An optional four-position rotary switch which
selects the separate LSZ-850 Lightning Sen-
sor System operating modes.
Off
All power is removed from the lightning sen-
sor system.
SBY (Standby)
Display of data from the lightning sensor sys-
tem inhibited, but it is accumulating data.
LX (Lightning Sensor System)
LX is fully operational and displaying data on
the indicator.
ANGLE-OF-ATTACK SYSTEM
General
A Safeflight angle-of-attack (AOA) system
(Figure 16-28) is installed in the Hawker 800
XP. Refer to Chapter 15, “Flight Controls,”
Stall Warning and Identification, for addi-
tional information on the airflow angle sensors.
It uses AOA information from the stall vanes.
Description
The Teledyne normalized AOA system senses
local angle of attack along with airplane flap
position, converts these inputs into lift infor-
mation, and displays it on a normalized, ten-gra-
dation, 0 to 1.0 dial. Zero lift is at 0 on the dial,
and the maximum usable lift point, as defined
by the
AFM
stall speed, is displayed as 1.0. In
effect, the indicator presents lift as a percent-
age. With flap position information, the display
is valid for all airplane configurations. There-
fore, the system continuously displays the mar-
gin to the maximum usable lift point (1.0),
regardless of airplane weight, bank angle, G
loading, or airplane configuration.
The AOA indicator provides outputs to oper-
ate heads-up indexers only when the gear is
down. The indexer displays the deviation in
discrete steps by means of three lights. These
lights are referenced to the V
REF
speed target.
An onspeed pointer indication (pointer cen-
tered on the index) produces a green dough-
nut in the indexer and an onspeed indication
of the FAST/SLOW indicator in the EADI.
RADIO ALTIMETER
The EADI displays radio altitudes from 2,500
feet AGL to 0 feet. The display brightness is
controlled remotely by a dimming poten-
tiometer or a variable-dimming voltage inde-
pendent of the integral instrument dimming
control. The display is blank if the radio alti-
tude is above 2,500 feet AGL or if the radio
altitude valid input is invalid.
16A-45
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
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