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The total travel of each servo can vary slightly, which can also cause the swashplate to be tilted fore and aft when the col-
lective is moved to the extreme high and low pitch positions. This situation can also be corrected if necessary through the use
of the travel adjustment function.
To check pitch-to-elevator 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 to the high pitch position while viewing the swashplate from the
left side of the model. While moving the swashplate, look for any tendencies for the swashplate to tilt fore or aft as it reaches the
high pitch positions. Repeat this procedure several times to be sure that your observations are correct. If no fore or aft tilting
tendencies are found, it will now be necessary to repeat this procedure from the center collective stick position to full low pitch.
If no tilting tendency is found, proceed to the next step.
In our example, we have shown that the swashplate has be tilted forward as the collective has been increased to full high
pitch. This would indicate that the front servo’s maximum travel is less than that of the two rear servos (left and right).
In this condition, we suggest that the travel value for the front servo be increased slightly (5–10%). Repeat the above pro-
cedure and increase the value as needed until the tilting tendency is eliminated. For information on the travel adjustment func-
tion, please refer to your radio’s instruction manual for details. Once this condition has been corrected, repeat this procedure for
the center to low collective pitch position and adjust as needed.
Note: It is very important that during this step, only the travel value for the front servo (elevator) be adjusted to correct
any pitch-to-elevator tendencies. If the travel value of the left or right servo changes, this will affect the pitch-to-
aileron tendencies corrected in the previous step. If you feel that readjustment of the left and right servo travel is
necessary, then it is suggested that the travel for each servo be increased or decreased at the same amount and the
pitch-to-aileron procedure be retested.
Note: Always disconnected the NiCad battery pack when the model is not in use.
View is shown from the left side of the
model. Notice how the swashplate has
tilted forward as the collective has
moved from the center to the full high
pitch position.
Pitch-to-Elevator Mixing Adjustment with Travel Adjust
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