PowerBox Systems Royal SRS Instruction Manual page 29

The model must initially be trimmed without the iGyro, or with the iGyro switched off, and must
be set up to fly straight and level. If you subsequently make adjustments to the model's trim, you
will need to re-start the set-up procedure, or carry out a zero calibration of the iGyro. This action
teaches the iGyro a new centre, so that the Heading mode can work properly. More on this later.
At least one channel is required for setting gyro gain in flight. If you only have one channel available,
six flights are needed for the manual set-up procedure, i.e. setting the correct values for Heading
and Normal modes for all three primary axes.
It is faster and more convenient to assign two channels to two rotary knobs or sliders for setting
up each axis. In this case only one flight is required for each axis in order to set up Heading and
Normal values.
Note: if you wish to fly a non-standard model, such as one with a thrust vector control system,
then one channel is sufficient, as the Heading value is not used in any case.
The following instructions assume the use of two assigned rotary knobs or sliders. If you are
short of channels, and can only use one channel for gain adjustment, then one flight must be
carried out to set the Normal value and one flight for the Heading value for each axis.
Note: as soon as the iGyro set-up procedure is complete, the channels you assign for this
purpose become available for other functions
Test-flying procedure:
I) Fly the model with the iGyro switched off, and trim it accurately
II) Assign one or two rotary controls or sliders in the INPUT MAPPING menu
III) Set the correct direction of gyro effect
IV) Fly the model in Flight Mode 1
V) Set gyro gain for Normal mode
VI) Set gyro gain for Heading mode
VII) Check the Airspeed Factor
VIII) Disable the rotary knobs or sliders
I) The Royal SRS is installed in the model, and the control surface channels and Flight Mode
switch have been assigned. Gyro gain should be set to 0% on all axes and in all flight modes.
This is accomplished by calling up the GYRO SETTINGS menu; you will then see this display:
The first and immediate step should be to check the operation of the Flight Mode switch: when
you operate the switch, the value at FM: must change to 2 and 3.
At the same time you should check that gain for the AILERON-A axis is set to 0% in all flight
modes. Repeat this test procedure for all axes: AILERON-A, AILERON-B, ELEVATOR-A, ELEVA-
TOR-B, RUDDER-A and RUDDER-B.
If you have previously set up mixers involving elevator and rudder or landing flaps, then these
must be disabled at the transmitter; the same applies to mixers involving rudder and aileron. If
you overlook this, the integral iGyro will not operate in Heading mode, since the control surfa-
ces will no longer be at the calibrated centre positions.
Exponential functions can be set in the usual way, but you may need to reduce the Expo set-
tings slightly when the gyro is active, as its effect tends to counteract control commands when
the pilot's commands are small. This behaviour diminishes with increasing stick travel, and
disappears completely at full travel.
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