PowerBox Systems Royal SRS Instruction Manual page 30

Note: if your model features other superimposed functions - such as camber-changing flaps
and ailerons - then you should be aware that the iGyro will not operate in Heading mode when
the flaps are deployed. In this case the gyro system only operates in Normal mode, since the
transmitter control is no longer at the centre position which the system "learned" when it was
switched on.
The direction of gyro effect is of no importance when the gyro is switched off. Test-fly the
model now in Flight Mode 1, i.e. with the gyro disabled.
When the model has landed, the system needs to learn the new trim values and end-points
of travel. With the engine or motor stopped, select the first point - ZERO GYRO - in the iGyro
menu, and leave the model motionless. The iGyro waits a few seconds before the RESET is
carried out; this pause gives you enough time to release the switch, so that no external mo-
vements can falsify the result. During this "zero calibration" procedure the system adopts the
new transmitter stick centre points, and resets the end-points. At the same time it calculates
any offset values for the MEMS sensors. When the zeroing process is complete, move all the
control functions to their end-stops in both directions, and the system automatically "re-le-
arns" the end-points of travel.
Note: if you subsequently make changes to the end-points or the centre position at the trans-
mitter, the ZERO GYRO menu point must be selected again, and all the transmitter sticks must
be moved once again to their end-stops. The end-point values are then automatically stored.
II) The first step is to set up the aileron axis in a test-flight. This means selecting the Input Map-
ping menu and assigning to the NORMAL GAIN - AILERON-A points the rotary knob or slider
which you wish to use to "teach" gyro gain for Normal mode. If the model features two aileron
channels, assign the same channel for NORMAL GAIN - AILERON-B:
If you have two spare channels available for adjusting gyro gain, assign a further channel for
AILERON-A and AILERON-B under HEADING GAIN.
Caution: the gain assignments for ELEVATOR and RUDDER must be left at 0!
The next step is to check the setting in the GYRO SETTINGS menu point: when you move the
rotary knob or slider, the values at GAIN NORMAL and GAIN HEADING must change from 0% to
100%. You can also check the other axes in the AXIS menu point. If two ailerons are used, the
gain values at AILERON-B must also be adjustable. The gain values for ELEVATOR-A/B and
RUDDER-A/B must remain at 0, even when you adjust the gain knob or slider.
In many tests we have found the ideal value for the AIRSPEED FACTOR point to be 2. This pa-
rameter only has a function when a GPS sensor is in use. A more accurate method of setting
the AIRSPEED FACTOR is described later in these instructions.
III) Setting the direction of effect: rotate the transmitter control for Heading Gain to 100%; the
direction of effect is most easily checked and set at this setting. Leave the transmitter stick
at centre, and move the model: you should clearly see a movement in the associated control
surface.
Checking direction of effect: move the right-hand wing up, and the right aileron must deflect
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