Futaba 9CPS - Manual (Page 76)

76
BUTTERFLY (crow) mixing (GLID2FL-C):
BUTTERFLY (often called "crow" - see GLID, p. 71 for details) simultaneously moves the flap, twin ailerons and elevator,
and is usually used to make steep descents or to limit increases in airspeed in dives.
Adjustability:
• Activation: Proportional by moving the T
HROTTLE S TICK
.
• Switch: Mix S
WITCH
is selectable. (SW/MODE function - B.FLY-SW item)
A to H: S WITCH A to H NULL: always on.
• Digital trim operation mode: Operation mode is selectable.
NORM: Normal digital trim operation
MIX: BUTTERFLY mixing rate trim operation while mixing is on.
• Inversely proportional to T HROTTLE S TICK : provides a proportional increase in amount of airbrake action as
T HROTTLE S TICK
is lowered (when S
WITCH A (assignable) is in down position). Includes selectable stick position where
airbrake begins. If you would like to have the airbrake be directly proportional to throttle stick, you will need to reverse
the THR-REV function. Note that this changes the throttle stick direction for all models. See page 31 for instructions.
• Elevator settings: (adjustable in the B.FLY-ELE )
B.FLY-ELE works linking with BUTTERFLY function. Elevator rate is adjustable in a
3 point curve.
Point 1: PRESET point. (Fixed)
Point 2: P-mid point. Position and rate are adjustable.
Point 3: P-end point. Position and rate are adjustable.
• Delayed reaction: You can suppress sudden changes in your model's attitude when BUTTERFLY is activated by setting
the delay (DELAY) 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, twin ailerons and flap may be set independently in BUTTERFLY, including set to 0 to have
no effect.
• Twin aileron servos: If AIL-DIFF function is inhibited, then AIL1and AIL2 settings will have no effect.
• If AIL-DIFF is active, then CH1 and CH7 may be independently adjusted.
• Normally both ailerons are raised equally in BUTTERFLY, 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.
Be sure you understand what dropping ailerons will do when in BUTTERFLY. Along with creating an enormous
amount of drag (desireble for spot landings), this also creates "wash-in", a higher angle of attack where the ailerons
are, and encourages tip stalling. If you are using this for aerobatic performance and not "sudden stops", consider
raising the ailerons and dropping the flaps instead as shown in the diagram above.