Flight Tune Expert Setting; Rudder Gyro Expert Setting - FUTABA CGY750 Instruction Manual

Expert Gyro and Governor Definitions and Tuning Section
F T E S
LT. une XPERT
FLT.Tune EXPERT MAP
When CondMenu is ON, this
changes into CondMenu.
When CondMenu is ON, this
changes into CondMenu.
When CondMenu is ON, this
changes into CondMenu.
A
When CondMenu is ON, this
changes into CondMenu.
E
MODE
Push
+/– key
FLT.Tu
R G E
UDDER YRO XPERT
RUD GYRO EXPERT MAP
MODE
Push
+/– key
RUD.Ex
ETTING
(1) Flight tune expert setting: start display
Use the MODE[+] or MODE[-] keys to navigate through the menus
(2) Dead band (AIL and ELE combined) [default: 4.0μS ] [ranges: 0μS ~ 25.0μS]
Transmitter control dead band. If you are noticing inconsistent swashplate drift or poor initialization
it could be poor TX potentiometer resolution. If you have to increase past 10.0 it is best to check
calibration on your TX.
(3) Head hold [default: 80%] [ranges: 0% ~ 200%]
Heading hold aspect of the gyro control. If the helicopter is not holding angle or cyclic control rates,
increasing the heading hold gain will improve holding the helicopter at a certain angle and improve
the cyclic rate consistency. If this is set too high you could see an oscillation on that axis. Lowering the
heading hold below default would be used if the transmitter gain is reduced and a consistent oscillation
is still not fixed during flight. (HeadHld A→Aileron HeadHld E→Elevator)
(4) Stop tune A [default: 80%] [ranges: 0% ~ 250%]
Cyclic stop tuning on the aileron axis. If the helicopter continues to coast after an after an ail
roll, lowering "StpTuneA" will create a harder stop action to remove the coasting. If the helicopter
bounces on the aileron axis after an aileron control input, increasing "StpTuneA" will reduce bounce.
(5) Stop tune E [default: 80%] [ranges: 0% ~ 250%]
Cyclic stop tuning on the elevator axis. If the helicopter after an elevator flip continues to coast,
lowering "Stop tune E" will create a harder stop action to remove the coasting. If the helicopter
continues to coast after an elevator flip, lowering the "Stop tune E" will reduce bounce.
(6) Head Response [default: 1] [ranges: 1 ~ 10]
Head Response matches the gyro control speed to that which the helicopter is capable of reacting.
In a standard helicopter a Head Response of 1 should always be used, but on some scale
applications, or uniquely designed rotor heads, increasing head response might be needed to cure
over correction of the gyro.
(7) Data reset
S
ETTING
(1) Rudder gyro expert setting: start display
Use the mode [+] or [-] keys to navigate through the menu.
(2) Rudder servo neutral setting [default: 0 μS] [ranges: -140μS ~+140 μS]
This parameter is used to set the neutral position of the rudder servo. Position the rudder servo
arm as perpendicular as possible to tail rotor pushrod prior to making adjustments with this pa-
rameter. Press the data [+] or [-] key to make adjustments.
(3) Pirouette speed [default: 3D=720deg/sec] [ranges: 100~999deg/sec]
This parameter adjusts the maximum pirouette speed of the tail rotor that the gyro will allow at
100% dual rate. The bottom of the line shows the actual pirouette speed of the rudder. Use the
data [+] or [-] key to adjust the maximum commanded pirouette rate.
(4) Rudder exponential [default:-20%] [ranges: -100% ~ +100%]
This parameter sets the feel of the tail rotor control around center. When set to [0] the control curve is linear.
Using a [+] value the tail rotor will be more sensitive around neutral, and using a [-] value will soften the feeling
around neutral. The RUD EXP parameter in your transmitter can also be used to tune the tail rotor to a desired
feeling.
(5) Control delay In [default: 3D=15, Sports=12] [ranges: 0 ~ 20]
This parameter sets the delay as you move the stick from neutral toward left or right. Larger
values result in a softer tail rotor feel off center. This parameter must be adjusted individually for
LEFT and RIGHT tail rotor commands. Use the data [+] or [-] key to adjust the value.
(6) Control delay Out [default: 3D=12, Sports=10] [ranges: 0 ~ 20]
This parameter sets the delay when the stick is returned back to the neutral position. This pa-
rameter is useful to tune how aggressively the tail rotor stops following a pirouette. The higher the
value, the softer the stop. This parameter must be adjusted individually for LEFT and RIGHT tail
rotor commands. Use the data [+] or [-] key to adjust the value.
(7) F/F mixing rate [default: 0%] [ranges: -100% ~ +100%]
Feed Forward mix is used to counteract sudden increases in torque from the motor during fast
collective pitch changes. If you notice a tail kick, using (right rudder on Clockwise rotor disk, left
rudder on CCW) F/F mixing can be tuned to reduce the tail kick.
(8) F/F mixing acceleration gain [default: 0%] [ranges: 0 ~ 200%]
In low head speed situations where a lot of F/F Mixing might be needed, acc. gain boosts the
input and removes it immediately after to help cure the sudden change in torque, but it does not
allow the large tail rotor input to alter the axial behavior of the helicopter.
(9) Data reset
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