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The limits of the THS normal setting range for takeoff are indicated by a green band
on the pitch trim wheel.
- In flight, when in direct law, the pilot uses the THS conventionally to fly in trim. In
flight, the aircraft pitch trim setting depends on aircraft CG, weight, altitude and
speed. Consequently, the relation between the aircraft CG, and the THS setting
displayed on the pitch trim wheel, does not apply in flight.
Following nosewheel touchdown, as the pitch attitude becomes less than 2.5~ for more
than 5 seconds, pitch trim is automatically reset to zero.
Note : This function is inoperative, when the green or yellow hydraulic system is not
pressurized.
CCM ALL
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┃I ~-~ A318 ┃ FLIGHT CONTROLS ┃1.27.40 P 3 ┃
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┃ Lli,~ A320 ┃ ┃SEQ 100 I ┃I REV 25 ┃
┃ A~7-~'M" .4321 ┃CONTROLS AND INDICATORS ┃ ┃ ┃
┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
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SIDESTICKS
Each pilot has on his lateral console a sidestick he can use to control pitch and roll
manually. Each sidestick is springloaded to neutral.
When the autopilot is engaged, a solenoid-operated detent locks both sidesticks in the
neutral position. If the pilot applies a force above a given threshold (5 daN in pitch, 3.5 daN
in roll) the stick becomes free and the autopilot disengages.
The hand grip has two switches :
- Autopilot disconnect and sidestick takeover pushbutton.
- Push-to-talk button.
NEUTRAL
RADIO
TAKE OVER PB
(A/P DISCONNECTION OR TAKE OVER
FROM OPPOSITE SIDESTICK)
Sidestick priority logic
-When only one pilot operates the sidestick, it sends his control signals to the
computers.
- When the pilots move both side stick simultaneously in the same or opposite direction
and neither takes priority, the system adds the signals of both pilots algebraically. The
total is limited to the signal that would result from the maximum deflection of a single
sidestick.
Both green CAPT and F/O SIDE STICK PRIORITY lights flash and a "DUAL INPUT" audio
voice message is given every 5 seconds as long as both pilots operate their side stick
simultaneously.
A pilot can deactivate the other stick and take full control by pressing and keeping pressed
his priority takeover pushbutton.
For latching the priority condition, it is recommended to press the takeover push button for
more than 40 seconds.
This allows the pilot to release his takeover push button without losing priority.
However, a pilot can at any time reactivate a deactivated stick by momentarily pressing the
takeover push button on either stick.
If both pilots press their takeover pushbuttons, the pilot that presses last gets priority.
Note ~ If an autopilot is engaged, the first action on a takeover pushbutton disengages it.
CCM ALL
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本文链接地址：
AIRBUS A320 Flight Crew Operating Manual3(95)
