PowerBox Systems iGyro SRS Instruction Manual page 23

5.8. Airspeed Settings
During a flight the iGyro automatically accepts the new maximum speed
values which are passed to it, and adjusts its stabilising behaviour to suit.
If you ever need to reset this value - perhaps when you switch to a different
model - this can be accomplished in the AIRSPEED SETTINGS menu.
In this menu you can read off the maximum speed achieved by the model;
this is the value which follows the point MAX AIRSP.
To reset the maximum speed, select the RESET MAX. SPEED menu
point. The speed is then reset to a value of 10 km/hr.
Note: it is also possible to test the GPS sensor: the ACT. SPEED point
shows the momentary speed.
Note: speeds below 10 km/hr are not very precise!
6. Important points for handling the iGyro in normal operations
6.1. Switching the system on
When the iGyro is switched on, it accepts the current stick positions as
centre, and calculates the sensor offset. For this reason it is important to
avoid touching the sticks and the model when you switch the system on.
Once switched on, the iGyro waits a moment until everything is
motionless before calculating the sensor offset.
6.2. Trimming one or more axes
If you alter the trims in Flight Mode 1, due perhaps to a change in the
model's Centre of Gravity or other modification to the airframe, the gyro
must be switched on and off again; alternatively select the ZERO GYRO
menu point briefly.
When the iGyro is switched on, it accepts the new centre settings again.
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