Copyright 2013 Eagle Tree Systems, LLC Page 10
Figure 11: Overall Gain vs. Stick
Position within Center Stick Box
2: Elevon – The Guardian does the elevon mixing internally. Dual Aileron / Flaperon support is not available.
3: V-Tail – The Rudder and Elevator channels are mixed internally. Dual ailerons / flaperons are supported.
2.
Center Stick Stabilize Only Mode
This feature is primarily for those who don’t have the Mode/Config switch connected, but want the benefits of 2D mode while also being able to perform acrobatics.
Maximum 2D Mode stabilization is active when the control stick is centered, and as the control stick is moved from center, the Overall Stabilization Gain reduces
proportionally as illustrated in Figure 11. (2D Mode Only)
Radio Stick Menu Options: 1: Off; 2: On
3.
Center Stick Box Size
The maximum deflection of the control stick before stabilization is fully disabled in Center Stick Only mode. The
stabilization gain will decrease proportionally with the deflection of the control stick from its centered position. Once
the stick is moved past a certain point, controlled by this setting, stabilization is fully disabled. (2D Mode Only)
Radio Stick Menu Options: 1-10: Center Stick Box Width
4.
Automatic Turn Coordination
Employs the “Step On The Ball” method to move the Rudder in order to coordinate your turns in 2D Mode. For more
information, see “Automatic Turn Coordination” under the “Main Features”/“2D Mode” section. (2D Mode Only)
When taxiing in 2D Mode on an incline, this feature will try to yaw your model down the hill. Additionally,
if the Guardian is not very close to the center of gravity, then this feature can increase the chance of Yaw
oscillations.
Radio Stick Menu Options: 1: Off; 2: Low; 10: High
5.
2D Heading Hold Gain
When the control stick is centered horizontally (zero Roll command) in 2D Mode, the controller will roll the plane to
track its current heading. (2D Mode Only)
Radio Stick Menu Options: 1: Off; 2: Low; 10: High
6.
Direct Rate 3D Control
When in 3D Mode, the plane will react much more precisely with this feature enabled. Instead of simply stabilizing the 3D flight, it will control the rotational rates of the
plane directly. This provides very strong disturbance (wind, airframe inertia, etc) rejection without having to “fight the gyro”. (3D Mode Only)
This feature will expand your servo deflections beyond any limits set on your transmitter, up to the limits set by the Guardian. See Expanded / Custom Servo
Ranges for more details on how to limit servo deflections.
Radio Stick Menu Options: 1: Off; 2: On
7.
Enable 3D Heading Hold
Enables the 3D Heading Hold feature in 3D Mode. Those looking for the stability and precision of the Guardian without anything else getting between them and their
airplane can disable this feature for a rate-gyro experience. (3D Mode Only)
Enabling Direct Rate 3D Stabilization is strongly recommended if this mode is set to “Off”.
Radio Stick Menu Options: 1: Off; 2: On
8.
Derivative Gain
Tunes the dampening/derivative gain of the airplane. Increasing this value will strengthen the “rate gyro” behavior of the Guardian while leaving the 2D leveling and 3D
Heading Hold behaviors the same.
Increasing this value without reducing your overall or individual axis gains will increase the chance of oscillations.
Radio Stick Menu Options: 1: Low Derivative; 10: High Derivative
9.
Onboard Dual Aileron Mixing Enabled
Configures the Guardian to accept unmixed Aileron and Flap (Aux In) inputs and mixes them internally to provide Dual Aileron / Flaperon outputs on Ail and Aux Out. If
disabled, the Guardian will accept premixed Flaperon signals. Useful with limited controllers that cannot perform Flaperon mixing. Disabled by default.
Radio Stick Menu Options: 1: Off; 2: On
10.
Aux Servo Output Reversed
Reverses the direction that stabilization will move your second Aileron servo if you are using the Aux channel in a Dual Aileron configuration.
Radio Stick Menu Options: 1: Off; 2: On
11.
2
nd
Elevon Reversed
Set this if the second Elevon servo on a “Delta” wing plane is not symmetrically mounted and is resulting in incorrect servo movements.
Radio Stick Menu Options: 1: Off; 2: On
12.
Expanded / Custom Servo Ranges
Allows advanced users to expand the functional range of their servos from 125% around their trim values to 150% around their trim values. Overall servo deflection range
is expanded to 175%, including trims. When configured on the PC software, this option also enables custom servo limits that can be set there.
This can damage your servos and your plane if activated carelessly. It is included for modelers that either need the extra range or wish to limit the ranges to their
servos. Make sure to reset your trims before activating this mode!
Radio Stick Menu Options: 1: Off; 2: On
13.
Default Flight Mode (For when Mode/Config switch is unused/disconnected)
If you don’t have the Mode input channel connected during flight, the Guardian will use the flight mode selected here. Note that you will need to set this with the PC
Software, or temporarily connect a switch to the Mode input channel to set it.
Radio Stick Menu Options: 1: 2D Mode (default); 2: 3D Mode
14.
Output Servo Pulse Frequency (PC Software Configuration ONLY)
Sets the pulse frequency of the servo signals going out of the Guardian. A default of 50 Hz is recommended for analog servos, but some digital servo support higher
frequencies. If the electronics are designed for it, the maximum frequency of 400 Hz will improve stability on more responsive airframes.
Setting this option above 50Hz for analog servos can cause them to work too hard and may cause damage if left for too long. Use with caution.
The Guardian PC Software
