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Futaba 9CHFsuper Manual

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Dual/triple rates and exponential (D/R,EXP): assigns adjusted rates and exponential.
Dual/Triple Rates: reduce/increase the servo travel by flipping a switch, or (ACRO/
GLIDER) they can be engaged by any stick position. Dual rates affect the control listed,
such as aileron, not just a single (ex: channel 1) servo. For example, adjusting aileron
dual rate will affect both aileron servos when using FLAPERON or AIL-DIF, and both aile-
ron and elevator servos’ travel when using AILEVATOR or ELEVON or a CCPM helicopter.
Activation:
• Any S
WITCH, A-H. If you choose a 3-position switch, then that dual rate instantly becomes a triple rate (see example).
• Stick position (ACRO/GLIDER). (Ex: On rudder you normally use only the center 3/4 of the stick movement except for
extreme maneuvers such as snaps/spins/stalls. As long as your R
UDDER STICK does not exceed 90% of maximum throw,
the rudder responds at your lower rate, allowing small, gentle corrections. When the stick passes 90% (ie. stall turn), the
rudder goes to high rate’s 90%, which is a MUCH higher amount of travel than your low rate at 89%.)
Ex: EPA = 1” Low Rate = 50% High Rate = 100%
At 89% Low Rate = .45”
At 90% High Rate = .9”
[Note] Only if any stick is chosen by the item of "SW1", a switch can also be chosen by the item of "SW2." When
operated simultaneously, the switch operation has priority over the stick operation. (ACRO)
Adjustability:
• Range: 0 - 140% (0 setting would deactivate the control completely.) Initial
value=100%
• Adjustable for each direction(ACRO/GLIDER). (ie. Up/down, left/right) (Ex: Most
models fly upright without any elevator trim, but require some down elevator
when inverted just to maintain level flight. By increasing the down travel by the
amount required to hold the model inverted, the model now has equal travel
available from level upright or level inverted.)
Exponential: changes the response curve of the servos relative to the stick position to make flying 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).
Why use expo? 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 S
WITCH D to “down” (toward the AILERON STICK).
• Cursor down to EXP and dial to 100%.
• Move S
WITCH D up. Hold the AILERON STICK at 1/4 stick and move 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.
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… 35 …


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