Futaba Cgy750 User manual

TABLE OF CONTENTS

•Introduction-----------------------------------------------------------------2

•

WarrantyandRepairService(inU.S.A.)

---------------------------------2

•Features----------------------------------------------------------------------2

•Contents----------------------------------------------------------------------2

•Precautions------------------------------------------------------------------3

•Speciﬁcations---------------------------------------------------------------3

•ReplacementandOptionalItems--------------------------------------4

•GyroSensorInstallation------------------------------------------------------ 4

•

ConnectingtheCGY750

----------------------------------------------------5

•TXSet-up------------------------------------------------------------------------- 6

•GovernorInstallation-----------------------------------------------------6

•GovernorFuselageSettingPrecautions-----------------------------6

•FirstMap------------------------------------------------------------------------- 7

•OpeningScreen-------------------------------------------------------------7

•HomeScreen----------------------------------------------------------------7

•WarningDisplay------------------------------------------------------------8

•SettingMenus--------------------------------------------------------------8

•S.BUSBasicSetting--------------------------------------------------------9

•SwashBasicSetting-----------------------------------------------------10

•SwashDetailSetting----------------------------------------------------12

•TXAileron/ElevatorGyroGainSet-up------------------------------13

•FlightTuningSetting---------------------------------------------------14

•RudderBasicSetting----------------------------------------------------15

•GovernorBasicSetting-------------------------------------------------16

•GovernorSpeedSetting------------------------------------------------ 18

•GovernorOperation-----------------------------------------------------18

•RecommendedGyroGainSettings----------------------------------18

•AdjustmentsDuringtheTestFlight---------------------------------18

•TipsforUsingtheCGY750GovernorwithElectricModels---- 18

•FlightTuneExpertSetting---------------------------------------------19

•RudderGyroExpertSetting-------------------------------------------19

•GovernorExpertSetting----------------------------------------------- 20

•ConditionMenu---------------------------------------------------------- 21

•CGY750V2-3D-MAP------------------------------------------------------22

•CGY750V2-F3C-MAP-----------------------------------------------------24

•F3CStyleTuningSection-----------------------------------------------26

Gyro

: Instructionsforgyrofunctions

Governor

: Instructionsforgovernorfunctions

Technicalupdatesandadditionalprogrammingexamplescanbefoundat:

www.futaba-rc.com/faq

1M23N24915

V2.0

INTRODUCTION

WARRANTY & REPAIR SERVICE (IN U.S.A.)

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www.futaba-rc.com or www.hobbyservices.com

Fax (217)-398-7721,Tel (217) 398-0007

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• Symptoms (including when the problem occurred)

• System (Transmitter, Receiver, Servos and model numbers)

• Model (Model name)

• Model numbers and quantity

• Your Name, Address and Telephone number

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Futaba Service Center

3002 N Apollo Drive Suite 1

Champaign, IL 61822

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FEATURES

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•Gyro section

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Rudder (yaw) section:

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•

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Aileron, Elevator (roll, pitch) section:

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•Governor section

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•

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•Other functions

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CONTENTS

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Extension Cord

Sensor Mounting Bracket

CGY750 Control Box

Mounting Pads (3)

Adjustment Screwdriver

Gyro Sensor

Magnets (2)

Dust Cover (3)

Revolution Sensor

ounting

Pad

s (3)

& Governor set

Meaning of Special Markings

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PDUNV

DANGER - Procedures which may lead to dangerous conditions

and cause death/serious injury if not carried out properly.

WARNING - Procedures which may lead to a dangerous condition

or cause death or serious injury to the user if not carried out properly

or procedures where the probability of superficial injury or physical

damage is high.

CAUTION - Procedures where the possibility of serious injury to

the user is small, but there is a danger of injury, or physical damage, if

not carried out properly.

: Prohibited : Mandatory

WARNING

Failure to follow these safety precautions may result in severe

injury to yourself and others.

• Read through the entire manual before operating this product.

BEFORE EACH FLIGHT:

Always check the transmitter and receiver battery voltage to ensure

they have enough remaining capacity to complete the ﬂight.

Always exit programming mode before attempting to ﬂy the model.

Only use the CGY750 with a 2.4GHz system such as the Futaba

FASST™ system, or a PCM system. Use with an FM system is strong-

ly discouraged since interference can cause serious operational prob-

lems.

Gyro operating precautions:

Gyro

The CGY750 requires 5-10 seconds to initialize when the power

is turned on. Do not move the helicopter and do not move the tail

rotor, aileron and elevator sticks during this initialization or the

gyro may not initialize properly. Once the initialization process

has been completed the swash servos and tail servo will move

several times indicating that the CGY750 is now ready for ﬂight.

Verify that the gyros are operating and compensating in the correct

direction before each ﬂight. If the compensation direction is incorrect

on any axis the model will become uncontrollable after takeoff.

Verify that the gyro is operating in the desired mode.

Verify that the gyro mounting pads are in good condition.

Verify that the gyro wires are not contacting the frame of the heli-

copter.

The servo type parameters within the CGY750 must match the type

of servo you are using. Incorrect setting may damage the CGY750 or

the servos, possibly resulting in a loss of control during ﬂight.

Always ensure that there is some slack in the gyro cables to help

maximize performance. Always use the supplied gyro mounting pads

to attach the gyro to the helicopter mechanics. Do not use a strap that

encompasses the CGY750 sensor. This may affect the overall perfor-

mance of the gyro.

Always allow the gyro to adjust to the surrounding environmental

temperature before ﬂight. A large temperature change during use will

cause drift and other operational issues.

The gyro sensor and control box have a electroconductive coating.

Do not allow any power leads or other wiring to come into contact with

these items.

If you are switching between Normal Mode and AVCS Mode in

ﬂight, please keep in mind that you must have the gyro re-learn the

center position after making a trim change within the transmitter.

To memorize the new center position simply flip the gain switch on

the transmitter three times between Normal Mode and AVCS Mode

(NormaltAVCStNormaltAVCS) within one second. The servo will

center indicating that the new center position has been memorized.

When operating the gyro in AVCS Mode, all compensation and

revolution mixing must be disabled and any tail rotor or swash offsets

for ﬂight modes must be disabled.

When the CGY750 is operated in AVCS mode the tail rotor or

swashplate servos will not center when tail rotor, aileron or rudder

stick is released. This is normal operation for AVCS mode. The servos

PRECAUTIONS

may also move to the extent while the model is being carried out to the

ﬂight line. Before take off, you must visually center the tail rotor pitch

slider and level the swash plate by using the transmitter control sticks.

You can also center the servos by moving the tail rotor stick full left, then

full right, back to full left and then allow the stick to center within one

second; the same method applies for aileron and elevator servos.

Do not drop the CGY750 sensor onto a hard surface or subject the

CGY750 sensor to a strong shock as this may damage the sensor.

Always use the supplied mounting pads or the Futaba replacement

mounting pads available from your local Futaba dealer.

Governor operating precautions:

Governor

When the throttle servo is connected to the CGY750, the battery fail-

safe function within the CGY750 must be setup and enabled.

Throttle fail safe function (transmitter setting): Use the fail safe func-

tion for the channel that turns the governor on and off to set the fail safe

position to the point at which the governor is turned off. With this setting,

when the system enters the fail safe state, the governor will be turned

off, and the receiver throttle signal (fail safe position preset) will be out-

put directly.

When using the condition hold function on the transmitter, always

set the throttle servo maximum operating point to less than the point at

which the governor is activated. If this is not done the governor may ac-

tivate while in condition hold.

While preparing for ﬂight or starting the engine, always ensure the

throttle remains below the governor activation point and do not select

any ﬂight modes that may activate the governor.

If you prefer to activate the governor while the model is still on the

ground, always ensure that you have at least -5 degrees of pitch in the

model before activating the governor. This negative pitch is necessary

to prevent an unexpected lift off as the governor activates and the head

speed increases to the desired RPM.

Periodically check the RPM sensor output to ensure proper governor

operation. Due to the high level of vibration and centrifugal forces the

magnet may come loose or the sensor alignment may change. Every

10th ﬂight verify that the magnet and sensor are properly mounted.

Width (Controller): LQ>PP@

(Gyro sensor): LQ>PP@

(Revolution sensor): LQ>PP@

Length (Controller): LQ>PP@

(Gyro sensor): LQ>PP@

(Revolution sensor): LQ>PP@

Height (Controller): LQ>PP@

(Gyro sensor): LQ>PP@

(Revolution sensor): LQ>PP@

Weight (Controller): R]>J@

(Gyro sensor): R]>J@

(Revolution sensor): R]>J@

Operating Voltage

: 9WR9'&

Current Drain: P$

Selectable Servo Frame:

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5XGGHU*\URRQO\5DWH

Center Pulse Width:

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  ȝV+]

Governor Resolution: +]USP

 (QJLQH530

RPM Accuracy:

Head Speed Range: USP

Operating Temperature: )WR)

 &WR&

Control System: 'LJLWDODGYDQFHGFRQWURO

Sensor:

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  +DOOHIIHFWVHQVRU

Angular Velocity Range: 'HJUHHV3HU

  6HFRQG*\UR

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WRXVH

SPECIFICATIONS

REPLACEMENT & OPTIONAL ITEMS

Futaba PC Interface CIU-2: FUTM0951

Extension 200 mm:

Extension 350 mm:

Extension 55 mm:

Extension 80 mm:

Extension 130 mm:

Mounting Pad:

1x22x22 mm (10)

WARNING

Newer high end servos and other radio equipment

are capable of placing large demands on the power

systems in use today. When using a regulator you

must ensure that the regulator is capable of supply-

ing the current demands of the equipment you have

selected. In addition to this make sure the wiring

and switch you have selected are capable of han-

dling high current draws.

• The servo current draw can be up to 50% higher on a ﬂybar-

less helicopter. Always ensure your receiver battery is fully

charged before each ﬂight.

Even though the CGY750 is a high performance

gyro and governor, it will be necessary to ensure

that the helicopter mechanics are also in optimum

operating condition. Please use the guidelines be-

low and address all issues before installing and ﬂy-

ing the CGY750.

• The CGY750 must be used with a rigid tail rotor drive system.

Any modern torque tube or belt drive system should be ad-

equate. Do not attempt to ﬂy the CGY750 using a wire driven

tail rotor system.

• Always ensure the drive gears, torque tube, pulleys, belt,

bearings and shafts are in proper working condition. If any of

these items are damaged or worn they must be replaced.

•

The linkage rod, tail rotor bell crank, pitch slider and tail rotor

grips must operate without friction to obtain the best perfor-

mance from the CGY750. Binding in the tail rotor control linkage

will decrease the performance of the CGY750 gyro and this may

also shorten the servo lifespan. Please take the time now to en-

sure the tail rotor system on your helicopter is working correctly

and without friction or binding.

• Vibration will affect the CGY750’s overall performance. All

rotating components on the helicopter should be balanced

to minimize vibrations in flight. Ensure that your engine or

electric motor is running smoothly and that all vibrations have

been addressed before installing and test ﬂying the CGY750.

Gyro sensor replacement:

• Each CGY750 gyro control box is calibrated speciﬁcally for

the gyro sensor included. Do not attempt to use another

CGY750 sensor with the control box as performance will suf-

fer due to being out of calibration. The calibration process

must be completed by an authorized service center.

If your sensor needs replacement, please send the complete

unit to your region’s support center for repair.

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Gyro Sensor

• Elevator (Pitch) axis

• Rudder (Yaw) axis

• Aileron (Roll)

axis

GYRO SENSOR INSTALLATION

Important: The CGY750 gyro sensor must be mounted so that the

roll and pitch sensing axis are in alignment with the helicopter. Any

misalignments over 1/2 of a degree will cause a loss in performance.

Please take extra care in this step to ensure the optimum ﬂight perfor-

mance.

TROUBLESHOOTING

If any issues are noted during ﬂight (such as drifting, inconsistent hold

or inconsistent control rates) then please review the following trouble-

shooting recommendations.

1. Always verify that the tail rotor and swash plate mechanisms oper-

ate, and that the drive system is in proper working order.

2. Electromagnetic interference could be causing the problem. If you

feel everything is set up correctly and that the helicopter is vibration

free, then consider moving the gyro sensor to a new location away

from servos, ESC and drive motors.

3. Vibrations will decrease the performance of all gyro systems. Even

though the CGY750 gyro sensor is the most vibration resistant gyro

sensor available, eliminating vibrations will always improve perfor-

mance. The CGY750 gyro sensor performs best when the sensor is

mounted rigidly to the airframe. This is mainly due to the sensing of

all 3 axes. It is highly recommended to avoid using soft foam pads

as this may allow the gyro to bounce around on the roll and pitch

axis, causing instabilities and possible loss of control during ﬂight.

• The bottom of the CGY750 Gyro

Sensor must be perpendicular to

the main shaft.

• The roll axis must be parallel to

the tail boom and the pitch axis

must be perpendicular to the side

frame.

OLED Display

• Displays menus, parame-

ters and status information.

Edit Keys

• Used when setting data.

• Use the included plastic ad-

justment screwdriver to press

the buttons.

ONNECTING THE

CGY750

Connection to the receiver, servos and sensors

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Using the CGY750 with a electric helicopter

DANGER

It is necessary to remove the pinion gear from the electric motor

or disconnect the motor from the ESC before powering the model

up for setup or bench testing. Electric motors are extremely pow-

erful and capable of delivering the power instantly, causing injury

to yourself, others, or the surroundings.

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PRGHOV

(1) Gyro Sensor:

• Connect the gyro sensor.

*Insert the sensor connector until it is

ﬁrmly locked.

(2)

Rsen (Revolution sensor)

• Connect the revolution sensor.

(3) S.BUS:

• Connect to the S.BUS output of the

receiver with the supplied extension.

(4) AIL Output:

• Connect the aileron servo.

(5) ELE Output:

• Connect the elevator servo.

(6) PIT Output:

• Connect the pitch servo.

(7) TH Output:

• Connect the throttle servo.

• Connect the ESC w/BEC and set the

operation mode to Gyro+THR mode.

(7) E2 2nd ELE Output:

• Connect the second elevator servo.

(Swash mode: H4-00 or H4-45)

(8) RUD Output:

• Connect the rudder servo.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

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WARNING

You will feel resistance at two points

when inserting the connector. Make sure

that you plug in the connector completely,

or connection problems may result.

Installing the Sensor Connector

1) First resistance (incomplete

connection)

Locking tab

2) Second resistance (fully

connected)

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³FOLFN´

H-1

SwashType

Yourtransmitter

shouldbereset

tothedefault

settingsandthe

swashplatetype

selectedwiththe

transmittershould

besettoNormal

(H-1)orsingle

servomode.All

CCPMmixingissetupandhandled

withtheCGY750,andthetransmitter

functionsshouldnotbeused.Before

startinghelicopterset-up,besure

thatalldualrates,pitchcurve,and

endpointvaluesaresetto100/100.

GOVERNOR INSTALLATION

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Cooling fan

Magnet (Embedded in cooling fan.)

Sensor (Attached to engine ﬂange

through a stay.)

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Magnet

Sensor

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WDLQHG8VHHSR[\DGKHVLYHWKDWFXUHVLQPLQXWHVRUORQJHU'RQRWXVH

HSR[LHVWKDWFRQWDLQPHWDOVXFKDV-%:HOG

Magnet

Cement the magnet to the cooling

fan so that the magnet is level

with this side of the cooling fan.

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WKHVSDUH PDJQHW WRWKHRSSRVLWH VLGH RIWKHFRROLQJ IDQ LQWKHRSSRVLWH

SRODULW\VRWKDWLWGRHVQRWRXWSXWDVLJQDO

Sensor mounting

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WLRQ

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VFUHZVDQGZDVKHUV

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HQJLQHPRXQWVFUHZ

Sensor adjustment

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“Revolution sensor testing” PHQXZLWKLQWKH³Governor Basic Setting´

1-2mm

Magnet

Sensor

2.2

3.7mm 3.7mm

Center of sensor

is offset.

Sensor

case

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EHFDUHIXOZKHQPRXQWLQJWKHVHQVRU

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ZHUHWHPSRUDULO\WLJKWHQHG

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GOVERNOR FUSELAGE SETTING PRECAUTIONS

Throttle servo linkage precautions

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ZKHQFRQQHFWLQJWKHVHUYROLQNDJH

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WR

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WRLWVPD[LPXPSRWHQWLDO

Fuselage vibration countermeasures

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FRQWUROEHFDXVHWKHJRYHUQRUFDQQRWFRUUHFWHQJLQHSUREOHPV

Use of a tuned silencer

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WLRQWREHOLQHDU

TX SET-UP

Condition selection

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Rotor Head Gyro Gain “RotHd.Gn”

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OHVV7;VHWWLQJ³5RW+G*Q´WR³,1+´ZLOOWKHQGHIDXOWWKHJDLQWR

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LV&+

Tail Rotor Gain “RGn”

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GHIDXOWLV&+

NOTE - Before starting helicopter set-up, be sure that

all dual rates, pitch curve, and endpoint values are set

to 100/100.

Governor

OPENING SCREEN Home SCREEN

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Initial Home screen

1. Axis indication 2. Gyro operation mode

3. Gyro gain

4. on/off switch

5.Yaw rate comp

7. Setting Menus

6. Battery voltage

(b) Aileron gain

display

(d) Gyro only

mode

1. Axis indicator

Gyro

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(/(RU58'DQGWKHLUUHVSHFWLYHFXUUHQWJDLQYDOXHV

2. Gyro operation mode

Gyro

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SOHWHGLPPHGLDWHO\

RUD AVCS Mode

at 100% gain

RUD NOR Mode

at 100% gain

Neutral offset at

AVCS mode

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Home screen

Push DATA

+/– key

Push DATA

+/– key

Push MODE

+/– key

Thick line

shows MODE.

Maximum

RPM

Condition#

indication

Engine

runtime

OLED

Setting

Maximum

Roll Rate

Maximum

elevator rate

Push DATA

+/– key

Thin line

shows DATA.

Push MODE +/– key

for 1 second

Swash

Flight Tuning Expert

Gyro (RUD)

Governor

FIRST MAP

Rudder gain display

The ﬁgure shows the ﬁrst layer of the editing

sequence.

Condition

CondData

Cond.1

WhenCondMenuisON,this

changesintoCondMenu.

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ULJKWDQGDOORZLWWRFRPHEDFNWRFHQWHUZLWKLQRQHVHFRQGWKHQWKHGLVSOD\

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3. Gyro gain

Gyro

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SRVLWLRQ

4. Operating condition

Governor

7KLVLQGLFDWHVZKHWKHUWKHJRYHUQRULV>21@RU>2))@

5. Battery voltage

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RQFHWKHYROWDJHKDVIDOOHQEHORZWKH%DWWHU\IDLOVDIHYROWDJHVHWWLQJ%)6

6. Setting Menus

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WLQJVPHQXPRGH

RPM display

Governor

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GLVSOD\RQFHWKHHQJLQHLVUXQQLQJDQGUHWXUQVWREDWWHU\YROWDJHGLV-

SOD\RQFHWKH HQJLQHKDVVWRSSHGUXQQLQJ7KH530 GLVSOD\FDQEH

HLWKHUWKH KHDGVSHHGRU WKHHQJLQH VSHHGGHSHQGLQJ RQWKHVHWWLQJ

LQ WKH UHYROXWLRQ GLVSOD\ PRGH VHWWLQJ IRXQG LQ WKH JRYHUQRU ([SHUW

PHQX

Home screen options

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5ROOUDWHPD[LPXPGLVSOD\DQG(OHYDWRUUDWHPD[LPXPGLVSOD\

1. Engine runtime

Governor

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UXQWLPHGLVSOD\7KHWLPHVKRZQLVKRZORQJWKHHQJLQHKDVEHHQUXQQLQJ

7KLVLVDFXPXODWLYHWLPHUDQGWKHYDOXHLVPDLQWDLQHGLQPHPRU\7RUHVHW

WKHWLPHUVLPSO\SUHVVWKHGDWD>@RU>@NH\IRUPRUHWKDQRQHVHFRQGDQG

WKHWLPHUZLOOUHVHWEDFNWR

2. OLED display options [default: Saver]

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2/('ZLOOVZLWFKEDFNWRIXOOEULJKWQHVV7KH>6DYHU@RSWLRQKHOSVWRFRQ-

VHUYHSRZHUDQGH[WHQGWKHOLIHRIWKHGLVSOD\:KHQWKH>/LJKW@RSWLRQ LV

VHOHFWHGWKHGLVSOD\ZLOOUHPDLQDWIXOOEULJKWQHVVDWDOOWLPHV

3. Condition menu [default: OFF]

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VZLWFKRUÀLJKWPRGH:KHQWKHFRQGLWLRQPHQXLVWXUQHGRQ>&RQG0HQX@

DSSHDUVLQWKHPDLQOLVWRIPHQXV

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OLVWHGLQWKHFRQGLWLRQPHQX

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4. Roll rate maximum display

Gyro

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5. Elevator rate maximum display

Gyro

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YDOXHLVUHVHWEDFNWRZKHQWKH&*<LVSRZHUHGXS

6. Maximum RPM

Governor

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FRUGHG530>0USP@7KH>0USP@YDOXHLVPDLQWDLQHGXQWLO\RXFOHDULWE\

SUHVVLQJWKHGDWD>@RU>@NH\IRUDWOHDVWRQHVHFRQG7KLVIXQFWLRQDOORZV

\RXWRFKHFNIRURYHUVSHHGLQJGXULQJÀLJKW

7. Condition #

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WARNING DISPLAY

Governor warning display

Governor

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LQJSRZHUXS,PPHGLDWHO\VZLWFKWRDFRQGLWLRQWKDWKDVWKHJRYHUQRU

GLVDEOHGDQG WKHV\PERO ZLOOGLVDSSHDU:KHQ WKLVZDUQLQJ V\PERO

LVVKRZQ WKHJRYHUQRU ZLOOEH GLVDEOHGXQWLOWKH ÀLJKWFRQGLWLRQ KDV

EHHQWXUQHGRII7KHHQJLQHPXVWEHVWDUWHGZLWKWKHJRYHUQRUWXUQHG

RII

Sensor Error Gyro

WARNING

The helicopter must remain motionless during the initialization process

or a [SensorER] sensor calibration error may occur.

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GHIHFWLYH

3OHDVHFRQWDFW \RXU UHJLRQ¶VWHFKQLFDO VXSSRUWFHQWHU WKH FRQWDFWLQ-

IRUPDWLRQFDQEHIRXQGLQWKHEHJLQQLQJRIWKLVPDQXDO

Low battery

WARNING

The [Low Batt] warning is displayed if the receiver battery voltage falls

below the [BAT/FS] voltage set within the CGY750 Governor Expert menu.

If this condition lasts for more than one second, then the Battery Fail Safe

function activates, and the throttle servo is brought back to idle position.

This is done to warn you that the battery voltage is dangerously low and that

you must land immediately.

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DFWLYDWH DJDLQ UHTXLULQJ \RX WR UHSHDW WKLV SURFHVV LI QHFHVVDU\ 7KH

PRGHOVKRXOGEHODQGHGDVVRRQDVSRVVLEOH

Memory writing indicator

WARNING

Do not power off the CGY750 when the Memory writing symbol is dis-

played.

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EH ZULWWHQ WR PHPRU\ 7KH ³0HPRU\ ZULWLQJ LQGLFDWRU´ LV GLVSOD\HG

GXULQJWKLVSURFHVV7KLVSURFHVVPD\WDNHXSWRWZRVHFRQGVDQGWKH

SRZHUPXVWQRWEHVZLWFKHGRIIGXULQJWKLVWLPH

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VHWWLQJVPD\EHORVW

Return servo to center position

SETTING MENUS

WARNING

Always exit the Setting Menu and return to the home screen before ﬂy-

ing your model. The gyro operation is disabled within several of the set-

tings menus to ease set up.

Always check the operation of the CGY750, verify that the controls are

operating the correct direction and ensure the gyros are correcting in the

proper direction for all axes prior to attempting to ﬂy the model.

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LWHPVUHVSHFWLYHO\

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XQWLOWKHKRPHVFUHHQLVVKRZQ

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+RPH6FUHHQ%DVLFDQG([SHUWPHQXV

7KH>*RYHUQRU@VHWWLQJPHQXLVQRWGLVSOD\HGLIWKH2SHUDWLQJ0RGH

KDVEHHQVHWWR>*\UR7KU@RULIWKHVZDVKSODWHW\SHKDVEHHQVHWWR

WKH+[[W\SH

(1) S.BUS connection setting:

start display

Use the mode [+] or [-] keys to

navigate through the menu.

Setting ranges common: 1 ~ 16ch, DG1,

DG2, INH

WARNING

Always verify that the S.BUS function as-

signments match your transmitter’s function

(in the FUNCTION menu) assignments. If any

changes are made within the transmitter func-

tion assignments, then it will also be necessary

to make the changes within the S.BUS function

assignments.

S.BUS BASIC SETTING

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S.BUS BASIC MAP

(2) S.BUS setting: Aileron channel [default: 1ch]