FUTABA GY501 Instruction Manual page 22

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EFORE SE
23
AVCS Mode Rudder Trim Reset Function
When the GY501 is used in the AVCS mode only, the AVCS
function automatically detects the rudder neutral position and rudder
trim is essentially unnecessary. However, when the GY501 is used
in the Normal mode, the neutral position is set by conventional
rudder trimming.
In the AVCS mode, the rudder stick position when the power was
turned on is memorized as the neutral position and when the rudder
is trimmed during flight, the neutral position will change.
In the normal mode, when the rudder neutral position was reset, and
the GY501 was switched to the AVCS mode in this state, the neutral
position will change. To correct the difference in the neutral position
in the Normal mode and the AVCS mode, the GY501 reads the
rudder signal at the point at which it was switched from the Normal
mode to the AVCS mode as the neutral reference point. Therefore,
when switching the GY501 from the Normal mode to the AVCS
mode, the following precautions are necessary:
[At power ON]
- When the power was turned on in the Normal mode, the rudder
neutral position already memorized in the GY501 is used.
- When the power was turned on in the AVCS mode, the rudder
signal at that point is memorized and updated.
[During use]
- When using the GY501 in the AVCS mode, set revolution mixing
to OFF.
- When the rudder was re-trimmed in the Normal mode and the new
trim position also affects the AVC mode, the rudder trim neutral
position must be memorized in the GY501. In this case, quickly
switch (interval of within 1 second) the transmitter remote gain
switch between the Normal and AVCS sides at least three times at