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Change the response curve of the servos relative to the stick position to make fly more pleasant. You
can make the servo movement less or more sensitive around neutral for rudder, aileron, elevator, and
throttle (except HELI type use THROTTLE CURVE instead). (ACRO type throttle EXP and THROTTLE
CURVE can not be activated simultaneously). Many models require a large amount of travel to
perform their best tricks.
However, without exponential, they are touchy around neutral, making them unpleasant to fly and
making small corrections very difficult. Additionally, by setting different exponentials for each rate,
you can make the effectiveness of small corrections similar in each rate, as in our example below:
The best way to understand exponential is to try it:
• Having made no changes yet in the D/R, EXP screen, move SWITCH D to DOWN (toward the
AILERON STICK).
• Move SWITCH D up. Hold the AILERON STICK at 1/4 sticks and moves SWITCH D down.
• Notice how much less travel there is.
• Go to 3/4 stick and repeat. Notice how the travel is much closer, if not identical.
Adjustability:
• More sensitive around neutral. (Positive exponential)
• Less sensitive around neutral. (Negative exponential)
• Adjustable for each direction. (ACRO/GLID)
For throttle, exponential is applied at the low end to help nitro and gasoline engines have a linear
throttle response, so that each 1/4 stick increases engine RPM 25% of the available range. (In most
engines this ranges from 5-60%)
Special note for helicopters: Helicopter model types have just a single rate for each switch position
rather than a rate for each side of the servo's travel per switch position. Additionally, setting the D/R,
EXP for each switch position requires cursor back to the No. setting and changing the switch position
here. Just flipping the switch does not affect the screen setting, allowing dual rates to be assigned
with idle-up and other features on certain switches, and does not require putting the model in that
condition to make modifications.
Special note for conditions: The helicopter and glider programming offers you the choice of COND.
This option allows you to have a separate rate for each of the 3 controls automatically selected when
changing conditions, for a total of FIVE rates available. Simply change the switch choice to COND.
and then:
(HELI) press the CURSOR LEVER to toggle through the 5 conditions while setting the rates.
(GLID) activate the corresponding condition to edit the rates.
“ATTITUDE”: By changing these figures to output different control signals.
There are 6 different attitude modes for aircraft: NORMAL, ATTI, GPS, HOVER, F/S and AUX. Every
mode will have a different rate to get a unique signal. NORMAL mode preset 0%, ATTI 50%, GPS
100%, HOVER 25%, F/S 75% and AUX 50%.
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