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Features of GY430

Set Contents

Connecting the GY430

Connecting the GY430 (S.BUS)

Mounting to Fuselage

Rudder Servo Linkage Check

The following items are supplied with the GY430:

Functions

Mini screwdriver

Sensor tape

Extension Cord: (Black)

Extension Cord: (Red)

Wiring strap

GY430

Monitor LED display

State

Color

Move

Reference

1. No servo pulse /    

sensor error

Red

Slow blink

2. Warm-up

Green

Fast blink

3. Sensor initialization Red/Green

ON

AVCS (Red)

Normal (Green)

4. Turn

Red/Green Fast blink

Right (Green)

Left (Red)

5. Neutral offset 

Orange

Slow blink

Stick operation

6. Gain off

OFF

7. Switch operation

Green

One blink Each time of switch 

operation

8. Low battery

Red

One flash

Less 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 GY430. 

The mode switching function allows AVCS/NORMAL gyro mode 

switching.

● Integrated, compact,and light weight

Compact size

20.5x20.5x11mm

and light weight

3.5g

realized by high density mounting technology.

● Easy setup

The GY430 can be used immediately with minimum setup.

● Supporting the S.BUS/S.BUS2 connection

 

Only one wire connection to the receiver can operate the GY430.

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 GY430 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 several times 
indicating that the GY430 is now ready for flight.

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

mize performance. Always use the supplied gyro mounting pads to attach 

the gyro to the helicopter mechanics. Do not use a strap that encompasses 
the GY430 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

NORMAL

AVCS

NORMAL

AVCS) within one second. The servo will center indi-

cating that the new center position has been memorized.

 

Be sure to use a digital servo. Use only digital servos with the GY430. 

Using the GY430 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 GY430  onto a hard surface or subject the GY430 to a 

strong shock as this may damage the sensor.

 

 When using the GY430 in the AVCS mode, set revolution mixing to OFF.

Rudder servo

※Only digital servo

Gyro gain CH(Receiver)←connect→Port2(GY430)

Remote gain effective.  Trimmer(GY430) becomes LIMIT.

Gyro gain CH(Receiver)←It does not connect→Port2(GY430)

Remote gain is invalid.  Trimmer(GY430) becomes GAIN.

Extension Cord:(Black)

Extension cord:(Red)

GY430

Port 3

Port 1

Rudder CH

Gyro gain CH

Port 2

Receiver

S.BUS Receiver

S.BUS  CH

Rudder --- 4CH

Gyro gain --- 5CH

GY430

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

GY430

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.

As shown in a figure, the direc-

tion which sticks GY430 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 GY430 

gyro, a rate gyro for RC helicopters. 

GY430 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.

  

GY430 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: 3.5g 
• F u n c t i o n s :   S e n s i t i v i t y   t r i m m e r .   L E D   m o n i t o r .   S e r v o 

selection(1520uS,760uS). S.BUS/S.BUS2 connection.

*Oil on the sensor bottom and the part in-

stalled to the frame can be wiped off with 

cleaner, etc.

GY430 installation precautions

· Always use the accessory sensor tape to 

install the GY430. Install the GY430 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 

NORMAL

 mode. 

In this case, make adjustments mechanically and make mini-

mum trimmer adjustments at the transmitter.

In the 

NORMAL

 mode, make the following linkage checks:

·In the rudder neutral position, connect the linkage at the position at 

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.

1M23N27202

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