The ice detector is powered from the XS2 bus
bar. An AC-powered motor drives a serrated
rotor which rotates close to a knife-edge cut-
ter. When ice forms on the rotor, the gap be-
tween the rotor and adjacent cutter is filled.
The shaving action of the cutter against the ice
increases motor torque, causing the motor to
rotate slightly within its mounting. The rota-
tion activates a microswitch which connects
a DC power supply and illuminates the amber
ICE DETECTD annunciator on the roof panel
and the amber ICE PROT
↑
annunciator light
on the MWS panel. When icing ceases, the mi-
croswitch opens and, after a 30-second delay,
the annunciators extinguish. The ICE DET
pushbutton switch in the roof panel TEST
group energizes both lights.
NOTE
The 30-second delay also occurs dur-
ing system testing.
HAWKER 800 XP
PILOT TRAINING MANUAL
FlightSafety
international
10-3
FOR TRAINING PURPOSES ONLY
Figure 10-3. Ice Protection Controls
Summary of Contents for 800 XP
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