Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 10-14
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 10
ENVIRONMENTAL
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
AUTOMATIC CONTROL
Cabin pressure is controlled by two outflow/safety valves on the rear pressure bulkhead. During normal
operation both valves are automatically controlled, but in the event of system malfunction, manual
control of one outflow/safety valve is available.
Each outflow valve is operated by the differential between the cabin pressure and a reference pressure,
sensed from a CABIN CONTROLLER via a pneumatic relay.
The CABIN CONTROLLER is located on the copilot’s instrument panel, right of the PFD. The controller
has two rotary selector knobs, one at the center and one offset at the bottom left.
The center knob controls the rotation of a dial with an outer and an inner scale. Both scales show
ALTitude graduated in FT x 1000. The outer displays the selected CABIN altitude. With a CABIN altitude
set, the inner scale shows the associated airplane altitude at a nominal cabin differential pressure of
8.55 psi. This will provide a 7500 feet cabin altitude at an airplane altitude of 41,000 feet.
The offset knob labelled RATE and marked with an arrow, is used to adjust cabin altitude rate of change.
The range is from approximately 2000 ft/min, with the knob set at MAX, to 50 ft/min with the knob set
at MIN. Setting the arrow vertically provides a rate of change of approximately 500 ft/min.
During automatic operation, cabin air passes through a filter into the pressure controller. The controller
is connected to ambient via two pneumatic relays and a venturi.
MFD
MFD
PFD
PFD
Copilot Instrument Panel
Pilot Instrument Panel
Center Instrument
Panel
N
I
B
A
C
T
F
C
A
A
L
T
F
T
1
0
0
0
x
S
I
MAX
RATE
MIN
26 24
28
1
2
3
CABIN
CONTROLLER