Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 7-6
Pilot’s Operating Manual
Revision A2: Nov, 2004
Sub-section 7
STALL WARNING/IDENTIFICATION
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
THIRD STALL IDENTIFICATION CHANNEL
A third channel for stall identification is provided by a pitot/static system which uses pitot pressure (P2)
from the right pitot head, static pressure (S6) from the forward static vents and a vent pressure (V) from
left and right stall vents. The stall vents are located on the under-side of the left and right wings
(reference Figure 4).
These pressures are sensed by a capsule operated stall detector, which is set to produce an output at
a point between the settings for the stall warning and identification signals from the SSUs.
The output from the third channel sensor energizes a relay which connects the stall identification output
from one channel’s SSU to the stall valve of the other channel. Thus, with the third channel output
activated, both stall valves A and B will open following a stall identification output from only one SSU,
thereby ensuring system integrity should a SSU fail.
VANE
ANGLE
SENSOR
I
N
P
U
T
WARN
IDENT
SSU
LEFT and
STICK -
MOTORS
I
N
P
U
T
WARN
IDENT
SSU
VANE
ANGLE
SENSOR
3rd
CHANNEL
RIGHT
SHAKER
STALL
VALVE A
3rd CHANNEL
STALL VENT
3rd CHANNEL
STALL VENT
HYDRAULIC
PRESSURE
STICK PUSHER
FLAP
ANGLE
STALL
VALVE B
Figure 3
Stall Warning and Identification
PITOT
PRESSURE
STATIC
PRESSURE