Igyro - Detailed Description; A) Special Features Of The Regulatory Algorithm - PowerBox Systems Royal SRS Instruction Manual

Procedure for setting up the Fail-Safe function: access the OUTPUT MAPPING menu and set the
appropriate outputs to fail-safe as shown above. Now leave the OUTPUT MAPPING menu and select
the RX/TX Settings menu, where you will find the TEACH FAILSAFE POSITIONS menu point.
Use the transmitter to move all the model's control surfaces, the undercarriage and the throttle to
the positions which you want them to take up if a fail-safe situation should occur, then press the
SET button: this action stores your selected positions. Check the settings by moving all the fun-
ctions to any "non fail-safe position" at the transmitter - e.g. move throttle to "full-throttle" - then
switch the transmitter off. All the outputs which are marked FS in the OUTPUT MAPPING menu
should now move to the previously set positions, whereas all outputs not marked FS remain in the
last known position.
Note: thanks to the backer's integral SRS system, and the facility to operate two receivers simulta-
neously, the chances of complete transmission failure are virtually zero. This claim is based on our
three years of experience with existing SRS products.

7. iGYRO - DETAILED DESCRIPTION

Once again, we strongly recommend that all the adjustments outlined in the following section
should be carried out using the SETUP ASSISTANT, as described earlier. Using the Assistant eli-
minates the danger of overlooking particular settings, and quickly leads to a satisfactory outcome.
However, there are some models which cannot be set up using the Assistant - including those with
thrust vector control and canard control surfaces - and for these the following points are intended
to clarify individual functions. They should also enable the modeller to use the system for non-stan-
dard applications.

a) Special features of the regulatory algorithm

The integral iGyro operates on all three primary axes, i.e. aileron, elevator and rudder. The gyro has
two different working modes:
- Heading mode: this acts when the transmitter stick for the associated control surface is at the
centre position. When the control surface is at centre, the iGyro maintains the last commanded
attitude, or heading.
A concrete example might be the elevator in knife-edge flight: the iGyro automatically eliminates
any tendency for the model to veer off course due to its Centre of Gravity position; there is no need
to make corrective elevator commands.
- Normal or damping mode: this acts when the transmitter stick for the associated control surface
is moved away from the centre position. In this mode the iGyro counteracts external influences.
A typical example would be a gust of wind, which would normally upset the model; the iGyro elimi-
nates the 'wobble' or damps it to a great extent, depending on the gyro gain you have set.
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