PowerBox Systems Mercury SRS Instruction Manual page 24

Launch the model and fly at half-throttle parallel with the landing strip.
Increase gyro gain until the aircraft just starts to oscillate around one axis.
At this point reduce gain slightly until the model shows no sign of oscilla-
ting in any speed range.
Note: if you are using the Mercury SRS without GPS II, it is vital to ensure
that the gain you set does not allow the model to oscillate even at
full-throttle.
Please take your time to complete this step properly! If the first level pass is
too short to enable you to turn up the gain as far as you would like, simply
carry out another pass. If you are not confident of doing this, ask a friend to
adjust the gyro gain setting for you.
If there is no wind at all when you carry out the set-up flights, it can be
helpful to give the gyro a little "work" to do: briefly move the sticks away
from centre to check that the model maintains its heading accurately,
without any tendency to over-correct.
The ideal test: set the model in the knife-edge attitude and adjust the rudder
on its own to maintain a steady height; leave the aileron and elevator sticks
alone. The model should now fly exactly straight, without any hint of oscilla-
tion.
This final test is by no means essential, but it does provide a very clear
demonstration of how effectively the iGyro does its job!
When you are sure that gyro gain is set correctly, move the flight mode
switch to select FM1. This causes the iGyro to adopt the previously
selected gain setting, and also immediately adjusts your pre-defined iGyro
flight modes. Once you have done this, you are free to activate the flight
mode you wish to use.
Example: gain setting established during the set-up flight: 37%. These
values are adopted for flight mode 2, while flight mode 1 and flight mode
3 are automatically adjusted by the Assistant based on your earlier inputs.
FM1: GYRO OFF
Aileron:
Elevator:
Rudder:
0% ATT.ASSIST: off
0% ATT.ASSIST: off
0% ATT.ASSIST: off
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