Manual Futaba CGY750 V 2.0 (page 27 of 27) (English)

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(Swash Detail) Pitch Compensation [default: ON]

This parameter works to hold the nose and the angle that the heli-

copter is set at regardless of collective pitch movements and direc-

tion changes. Press the DATA [+] or [-] key to turn the function on or

off.

(Rudder Expert) Rudder delay mode[default: Function]

Select [Function] for a softer control feel and [Constant] for a linear

and aggressive feel.

(Rudder Expert) Gain tracking [default: 0%] [ranges: -20% ~

+20%]

Gain tracking is another method to adjust how the tail rotor stops.

For example, when there is a bounce when stopping a left pirouette

or the helicopter coasts when stopping right pirouette, increase gain

tracking in the + direction. In the opposite situation, shift the gain

tracking in the - direction.

(Rudder Expert) F/F mixing [default:off ]

Feed Forward mixing is activated with this parameter. F/F mixing

is a pitch to rudder mix applied outside of the gyro compensation’s

control loop and before the gyro itself can even sense undesired tail

rotor movement. F/F mixing is handled within the CGY750. Do not

attempt to use revolution or acceleration mixing within your trans-

mitter as this will actually adjust the input signal to the gyro and

cause drifting.

(Rudder Expert) Neutral compensation [default: on]

This parameter works to recall the neutral point of the rudder servo

for improving tail stop motion. To use this parameter effectively, hov-

er the helicopter for about one second, and memorize the neutral

point. If ﬂying a 3D helicopter, this parameter may not work as well

due to the quick and aggressive movements, so test with it turned

on and off and decide which yields better stop behavior. Use the

data [+] or [-] key to enable or disable this option.

(Rudder Expert) Yaw smoother [default: on]

This parameter selects the rudder control feeling. When turned

on, rudder control becomes more exact. When turned off, rudder

control authority increases. Select the rudder control feeling to your

taste. Use the data [+] or [-] key to enable or disable this parameter.

(Swash Detail) Rotational tracking [default: 0%]

This parameter tunes the rotational equalizer to the pirouette char-

acteristics of the model. When pirouetting the model at the desired

rate, observe the model’s rotor DISK (NOT the mechanics) and

tune the ROT.Trak until the disk stays ﬂat during the pirouette. Find

the best average setting for both left and right pirouettes

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(

Rudder Expert) Stop delay [default: 120%] [ranges: 100%

400%]

This parameter may also be used to adjust the aggressiveness of

the stop but is individually NOT tuneable for LEFT versus RIGHT

tail rotor commands. Larger values will soften the tail stops result-

ing in less bounce. Use the data [+] or [-] key to adjust the value.

(Rudder Expert) Gain change up delay [default: 12] [ranges: 1

50]

This parameter sets the delay of change of the gyro gain from low

to high when switching from idle up to hover and helps avoid the

chance for tail rotor hunting during this switch. Use the data [+] or [-]

key to adjust the value.

(Rudder Expert) Gain change down delay [default: 3] [ranges:

50]

This sets the delay of the gyro gain from high to low as would occur

during a switch from hover into idle up and helps prevent the tail

from feeling “loose” while the head speed accelerates to the higher

rate. Use the data [+] or [-] key to adjust the value.

(Rudder Expert) Rudder histeresis [default: 7 μS] [ranges: 0

μS ~ 50 μS]

Hysteresis adjusts the range right around center of tail rotor stick

travel within which a tail rotor input will result in no rudder servo

movement. The greater the value, the wider the range where stick

movement yields no servo movement. Use the data [+] or [-] key to

adjust the value.

(

AIL,ELE Expert) I gain <integral gain> [default: AIL 80%

ELE 80%] [ranges: 0%

200%]

I gain tunes the ability of the model to maintain a given heading.

Inadequate I gain results in a change in model heading especially

with aggressive collective pitch input. Excessive I gain can result

in oscillations in forward ﬂight or with cyclic input. On the ELE axis

especially, excessive I gain can create bounce.

(AIL,ELE Expert) D gain <derivative gain> [default: AIL 0%

ELE 80%] [ranges: 0%

250%]

D gain is best used to tune the stops following cyclic commands.

Inadequate D gain results in a large slow bounce. Excessive D gain

causes cyclic coasting with a quick bounce or oscillation in forward

ﬂight or with cyclic input.

(AIL Expert) Aileron compensation [default: 0%] [ranges:

100%]

This parameter sets the mixing rate of the pitch to aileron mixing.

The roll axis may be affected by positive/negative collective pitch

movement as manifested by the model rolling off either to the left or

to the right during rapid ascent or descent. This mixing compensates

this effect. The mixing amount can be adjusted individually for both

positive and negative collective pitch inputs.

(ELE Expert) Flip compensation [default: 0%] [ranges: 0%

100%]

This parameter sets the mixing rate of the elevator to aileron mixing.

The roll axis may be affected by a pitch axis (elevator) input as

manifested by the model rolling off to the left or right during ﬂips or

loops. This mixing compensates this effect. The mixing amount can

be adjusted individually for both up and down elevator stick inputs.

(Swash Detail) Phase equalizer [default: off]

This parameter optimizes swashplate phasing during pirouettes.

Press the DATA [+] or [-] key to turn the function on or off.

NOTE: This parameter needs rotor head RPM and direction of rota-

tion to work correctly, so please set the rotor head RPM and direc-

tion in the governor menu. NOTE that rotor head speed information

must still be set into the CGY750 governor menu even if using an

electronic speed control (ESC) with an electric model.

(AIL Expert) Roll compensation [default: 0%] [ranges: 0%

100%]

This parameter sets the mixing rate of the aileron to elevator mixing.

The elevator axis may be affected by the aileron input as manifested

by a tendency for the model to corkscrew or otherwise roll non-

axially. This mixing compensates this effect. The mixing amount can

be adjusted individually for both left and right aileron inputs.

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Futaba CGY750 V 2.0 Manual

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