Futaba GY440 Handleiding

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Features of GY440Set Contents

Connecting the GY440

Connecting the GY440 (S.BUS)

Mounting to Fuselage

Rudder Servo Linkage Check

The following items are supplied with the GY440:

Functions

Mini screwdriver

Sensor tape

Extension Cord: (Black)

Extension Cord: (Red)

Wiring strap

GY440

Monitor LED display

StateColor MoveReference

1. No servo pulse /

sensor errorRedSlow blink

2. Warm-upGreenFast blink

3. Sensor initializationRed/GreenONAVCS (Red)

Normal (Green)

4. TurnRed/GreenFast blinkRight (Green)

Left (Red)

5. Neutral offsetOrangeSlow blinkStick operation

6. Gain off−OFF

7. Switch operationGreenOne blinkEach time of switch

operation

8. Low batteryRedOne flashLess than 3.8V

● Remote gain function and mode switching function

You can adjust gain from the transmitter by using the remote gain

function. Gain can also be adjusted with the trimmer on the GY440.

The mode switching function allows AVCS/NORMAL gyro mode

switching.

● Integrated, compact,and light weight

Compact size（20.5x20.5x11mm）and light weight（3.7g）

realized by high density mounting technology.

● Easy setup

The GY440 can be used immediately with minimum setup.

● Supporting the S.BUS/S.BUS2 connection

Only one wire connection to the receiver can operate the GY440.

I

NSTRUCTION

M

ANUAL

I

NSTRUCTION

M

ANUAL

Rate Gyro for Helicopters

For RC models

●Trimmer

（Limit / Gain）

●LED

●Servo Selection Switch●Port1（Rudder input/S.BUS input）

●Port2（Gain input）

●Port3（Rudder output）

●Gyro Direction

Switch

WARNING

Failure to follow these safety precautions may result in severe injury

to yourself and others.

Always check the transmitter and receiver battery voltage to ensure

they have enough remaining capacity to complete the flight.

The GY440 requires 3-5 seconds to initialize when the power is turned

on. Do not move the helicopter and do not move the rudder stick during

this initialization or the gyro may not initialize properly. Once the initializa-

tion process has been completed the rudder servo will move (a little) sev-

eral times indicating that the GY440 is now ready for 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 en-

compasses the GY440 sensor. This may affect the overall performance of

the gyro.

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 posi-

tion 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 (NORMAL→AVCS →N

ORMAL →AVCS →NORMAL →AVCS) within one second. The servo will

center indicating that the new center position has been memorized.

Be sure to use a digital servo. Use only digital servos with the GY440.

Using the GY440 with an analog servo will damage the servo.

Always check the direction of operation of the servos. If you attempt to

fly the model when a servo operates in the wrong direction, the fuselage

will spin in a fixed direction and enter an extremely dangerous state.

Do not drop the GY440 onto a hard surface or subject the GY440 to a

strong shock as this may damage the sensor.

When using the GY440 in the AVCS mode, set revolution mixing to

OFF.

Do not place gyro near heating equipment (engine, motor, ESC, bat-

tery, servo, etc.). Always allow the gyro to adjust to the surrounding envi-

ronmental temperature before flight. A large temperature change during

use will cause drift and other operational issues.

Rudder servo

※Only digital servo

Gyro gain CH(Receiver)←connect→Port2(GY440)

Remote gain effective. Trimmer(GY440) becomes LIMIT.

Gyro gain CH(Receiver)←It does not connect→Port2(GY440)

Remote gain is invalid. Trimmer(GY440) becomes GAIN.

Extension Cord:（Black）

Extension cord:（Red）GY440

Port 3

Port 1

Rudder CH

Gyro gain CH

Port 2

Receiver

S.BUS Receiver

S.BUS CH

Rudder --- 4CH

Gyro gain --- 5CH

GY440

Port 2 is not connected.

In S.BUS connection, the port 2

is not connected.

Remote gain is still effective.

S.BUS/S.BUS 2 port

Rudder servo

※Only digital servo

Extension cord:（Black）

Port 3

Port 1

Main rotor shaft

90°

Gyro mounted to the helicopter

GY440

Sensor tape

LIMIT

GAIN

LIMIT

GAIN

Install the sensor so that the bottom of the

gyro is perpendicular to the main rotor shaft

axial direction. Offset of this axis will also re-

act in the roll and pitch directions.

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tion which sticks GY440 is free.

• No part of this manual may be reproduced in any form without

prior permission.

• The contents of this manual are subject to change without prior

notice.

• Futaba is not liable for any potential damage (accidental or oth-

erwise) that may occur after installation.

Before using your new gyro, please read this manual thoroughly

and use the gyro properly and safely. After reading this manual,

store it in a safe place.

Thank you for purchasing a GY440

gyro, a rate gyro for RC helicopters.

GY440 is a lightweight micro gyro

developed for RC helicopter rudder

(yaw axis) control. It can be used with

mininum setup and includes an S.BUS/

S.BUS2 port.

GY440 Ratings:

(Integrated sensor type rate gyro)

• Gyro sensor: MEMS vibrating structure gyro

• Operating voltage: DC4.0V to 8.4V

• Current drain: 30mA (excluding a servo)

• Operating temperature range: -10ºC to +45ºC

• Dimensions: 20.5 x 20.5 x 11.0mm (except protrusion)

• Weight: 3.7g

• Functions: Sensitivity trimmer. LED monitor. Servo

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*Oil on the sensor bottom and the part in-

stalled to the frame can be wiped off with

cleaner, etc.

GY440 installation precautions

· Always use the accessory sensor tape to

install the GY440. Install the GY440 the

center of the sensor tape.

· Depending on the vibration from the heli-

copter, the sponge may tear near the cor-

ners of the sensor tape. If the helicopter is

flown in this state, vibrations will not be

sufficiently absorbed and the sensor may

fall off. Before flight, always check the sen-

sor installation state. If the sponge is torn,

replace it.

Make the initial linkage connections in the NORMALmode.

In this case, make adjustments mechanically and make mini-

mum trimmer adjustments at the transmitter.

In the NORMAL mode, make the following linkage checks:

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which the servo horn and control wire are perpendicular.

Perpendicular Control wire

Set the servo horn length based on

the helicopter manufacturer's instruc-

tions.

Move the rudder stick to the right and left and check the di-

rection of operation of the tail rotor. If the tail rotor turns in

the wrong direction, reverse the direction with the transmitter

reverse function.

1M23N30602

Product specificaties