Futaba 9CPS - Manual (Page 56)

AIRBRAKE/BUTTERFLY(crow) mixing (ACRO/GLID):
Like FLAPERON and AILEVATOR, AIRBRAKE is one function that is really made up of a series of pre-programmed mixes all
done for you within the radio. AIRBRAKE(often called "crow" or BUTTERFLY - see GLID, p. 71 for details) simultaneously
moves the flap(s) (if installed), twin ailerons (if installed) and elevator(s), and is usually used to make steep descents or to
limit increases in airspeed in dives.
This function is often used even on models without flaps as an easy way to use the flaperons and FLAP-ELEVATOR mixing together.
Adjustability:
Activation: Proportional by moving the T
HROTTLE S TICK , or set positions by flipping the assigned switch.
Lnear (Inversely proportional to T
HROTTLE S TICK ): provides a proportional increase in amount of AIRBRAKE action as
T HROTTLE S TICK
is lowered and assigned switch is on. Provides gradually more AIRBRAKE as you slow the engine.
Includes selectable stick position where AIRBRAKE begins, gradually increasing to the same setting as MANUAL as the
T
HROTTLE S TICK is lowered. If you would like to have the airbrake be directly proportional to throttle stick, you will need
MANUAL (ACRO only): Provides AIRBRAKE response immediately upon switch movement, going to a pre-set travel on
each active channel without any means of in-flight adjustment. (MANUAL option not available in GLID modes.)
Delayed reaction: You can suppress sudden changes in your model's attitude when AIRBRAKE/BUTTERFLY is activated
by setting the delay (DELAY-ELE) item, to slow down the elevator response, allowing the flaps/ailerons/elevator to all
reach their desired end point together. A setting of 100% slows the servo to take approximately one second to travel the
prescribed distance.
Channels controlled: Elevator(s), twin ailerons and flap(s) may be set independently in AIRBRAKE, including set to 0
to have no effect.
Twin aileron servos: If FLAPERON, ELEVON and AIL-DIFF functions are inhibited, then AIL1 and AIL2 settings will have
no effect.
If FLAPERON is active, the travel of the ailerons can be independently adjusted for the servos plugged into CH1
and CH6. The flap choice has no effect on the flaperons.
If AIL-DIFF is active, then CH1 and CH7 may be independently adjusted.
Normally both ailerons are raised equally in AIRBRAKE, and the elevator motion is set to maintain trim when
the ailerons rise. Different amounts may be set for each aileron to correct for torque reactions and other unique
characteristics of the model.
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to reverse the THR-REV function. Note that this changes the throttle stick direction for all models. See page 31 for
instructions.
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Switch: Mix S WITCH is selectable.
ACRO: SW SELECT function (A.BRK-SW item)
GLID: SW/MODE function (B.FLY-SW item)
Digital trim operation mode:
Operation mode
is selectable. (GLID)
SW/MODE function (TRIM item):
NORM: Normal digital trim operation
MIX: BUTTERFLY mixing rate trim operation
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During Airbrake operation, the elevator travel is displayed on the elevator trim display in the Startup screen.
Adjustable in flight: Using the elevator trim lever in flight can be set to adjust the elevator settings in your airbrake rather
than adjusting the model's actual elevator trim. This allows easy adjustment for any ballooning while in flight. When the
airbrake switch is moved to off the trims are again adjusting the normal elevator trim.