5-5
38
It is very possible that the travel of each servo varies slightly, which can cause the swashplate to be tilted to the left or right
when the collective is moved to the extreme high and low pitch positions. This condition is generally more common when stan-
dard type servos are used. If JR digital servos are used, the adjustment required is generally very small, if any. These variations
in travel can be corrected by altering the travel value of each servo slightly through the travel adjustment function.
To check the pitch-to-aileron mixing, it will first be necessary to position the collective stick in the center position as in the
previous steps. Next, move the collective stick from the center position to the high pitch position while viewing the swashplate
from the rear of the model as shown in the diagram below. While moving the swashplate, look for any tendency for the swash-
plate to roll to the left or right as it reaches the high pitch position. Repeat this procedure several times to be sure that your
observations are correct. If no rolling tendency is found, it will now be necessary to repeat this procedure from the center col-
lective stick position to full low pitch. If no rolling tendency is found, proceed to step 5-6.
In our example, we have shown that the swashplate has been tilted to the right as the collective has been increased to full
pitch. This would indicate that the left servo’s maximum travel is greater than the right servo’s maximum travel.
Note:
Before moving the throttle stick, please make sure that the motor wires have been disconnected.
In this condition, we suggest that the travel value for the left servo be reduced slightly (5–10%). Repeat the procedure
above if the same condition occurs, but to a lesser degree. The travel value of the right servo should be increased slightly and
retested. In most cases, it will require only the adjustment of the left or right servo to correct this situation.
View is shown from the rear of the
model. Notice how the swashplate
has tilted to the right as the collective
has moved from center to full high
pitch position.
High
Low
Once this condition has been
corrected, repeat this procedure
for the center to low collective
pitch position and adjust as
needed.
AILE=
Left Servo
ELEV=
Front Servo
AUX1=
Right Servo
Pitch-to-Aileron Mixing Adjustment with Travel Adjust
