DCS AERGES MIRAGE F1, Flight Manual

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DCS: Mirage F1 Flight Manual Version 1.0
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3.6 CONTROL SYSTEM
Description
The control surfaces for the aircraft are:

Pitch: 2 stabilators

Roll: 2 ailerons, 2 spoilers and differential stabilator deflection for dampening in
automatic pilot mode.

Yaw: A rudder
The normal operation mode for the control system is electrohydraulic in pitch and yaw and
mechanical in roll. The flight stick is hydraulically connected in the pitch chain to 2 releasable
bell cranks that can either transmit the pilot orders to servomotors or, when engaged in a
degraded flight mode called ‘manual hydraulic’, directly to the control surfaces. The rudder
pedals are similarly connected to the rudder.
This mode provides dampening in yaw and pitch and makes the behaviour of the aircraft
generally ‘smoother’. When strong acceleration changes occur, sometimes during sudden and
hard manoeuvres, or when electrical supply to the servomotors is cut, the aircraft enters manual
hydraulic mode. This mode is more uncomfortable for the pilot and makes the aircraft more
difficult to control. The servomotors and the electrohydraulic mode can be reset through a
pushbutton.
In the pitch chain, an element called ARTHUR plays an important role. The ARTHUR function is
to limit the pitch sensitivity of the aircraft in certain situations. It has 3 modes: high sensitivity,
low sensitivity and auto. In normal operation in auto mode, it adjusts the control stick sensitivity
as a function of altitude and airspeed. Another element called DASH-POT increases the
resistance of the stick as a function of the velocity of the input.
Trim is available for all 3 aircraft axes, with the roll trim only acting on the ailerons and not the
spoilers. Furthermore, the yaw trim has an automatic anti-slip mode that compensates any
sideslip in stabilized flight.
Controls
- Control stick: controls pitch and roll.
- Rudder pedals: control yaw.
- Trim hat: controls pitch and roll trim.
- Yaw trim switch: control yaw trim.
- Servo reset button: allows for a reset of the servos if all the working conditions are met.
- Pitch mode switch: allows to activate and deactivate the pitch electrohydraulic mode.
- Yaw mode switch Anti-slip/Yaw/Off: allows to deactivate the anti-slip mode and the
electrohydraulic mode separately.
- ARTHUR switch (under guard) AUTO/HIGH/LOW: Allows the pilot to select the sensitivity
mode of the ARTHUR.
Indicators
- Trim indicators: show the position of pitch, roll and yaw trims.