Page 11-10
Pilot’s Operating Manual
Original Issue: Feb, 2002
Sub-section 11
ICE PROTECTION
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
ICE PROTECTION - WINDSCREENS
The two forward facing curved windscreens ('A' screens) and the left and right forward sidescreens ('B'
screens) are anti-iced and anti-misted by electrical heating.
ELECTRICAL HEATING SYSTEM
Power for windscreen and sidescreen heating is supplied from two 208V, frequency wild, three phase
alternators, one driven from each main engine. Each alternator is controlled by an associated
ALTERNATOR 1 (2) ON/OFF switch. The alternator driven from No. 1 engine normally powers the left
windscreen and the right sidescreen; the one driven from No. 2 engine, the right windscreen and the
left sidescreen. If an alternator fails, the other automatically supplies both windscreens, but both
sidescreens are disconnected. Alternator failure is indicated by the illumination of an associated ALTR
FAIL 1 (2) annunciator and the MWS ICE PROT
repeater annunciator.
The two forward facing panels of the windshield each incorporate a gold film heating element. Power
supplies, from the alternator to the elements, are controlled by SCREEN HEAT ON-OFF switches (L or
R). With SCREEN HEAT ON, the panel temperature, detected by integral sensing elements, is
regulated by thermal controllers, one for each windscreen.
In the event of overheat occurring in a panel, a related SCREEN OVHT annunciator and the MWS ICE
PROT repeater annunciator will illuminate. At the same time, a relay operates to disconnect the power
supply to the overheating element.
When the airplane is on the ground or in flight without ENG ANTICE selected, the windshields are
heated to a lower temperature setting. In flight, with ENG ANTICE selected, the temperature is
controlled at a higher value.
L SCREEN
OVHT
R SCREEN
OVHT
ALTR 1
FAIL
ALTR 2
FAIL
SIDE SCRN
OVHT
ICE
PROT
OFF
ALTERNATOR
1
ON
2
SCREENHEAT
1
ON
2
OFF
Overhead Roof Panel
MWS Panel
Содержание Hawker 800XP
Страница 18: ...Page 16 of 16 P N 140 590032 0007 Revision A5 Feb 2012 Pilot s Operating Manual Intentionally left blank...
Страница 20: ...Page 2 of 2 Pilot s Operating Manual P N 140 590032 0007LOTC September 22 2010 Intentionally left blank...
Страница 22: ...Page 2 of 2 P N 140 590032 0007A5 Log Of Revisions Intentionally left blank...