Futaba GYA441 User Manual

1M23N30802

RateGyrofor Airplanes

AileronorElevatoruse

ForRCmodels INSTRUCTION MANUAL

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.

•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 otherwise) that may occur after installation.

Features of GYA441

● Dedicated airplane setting

Stabilizes flight, even with hard-to-control scale models.

● Compatible with aileron or elevator control

The GYA441 can be used even with airplanes with one servo each at the left and right wings.(S.BUS only)

● Remote gain function

The remote gain function allows the sensitivity of the gyro to be adjusted from the transmitter and the mode switching function allows AVCS/NORMAL gyro mode

switching. Also the gain can be adjusted by the trimmer on the GYA441.

● Integrated type, compact size and light weight

High-density mounting technology makes the GYA441 compact (20.5 x 20.5 x 11 mm) and lightweight (3.7 g).

● Easy setup

Basic settings let you be flight-ready in an instant.

● Supporting the S.BUS/S.BUS2 connection

Only one wire connection to the receiver can operate the GYA441.

Name and Function of Each Part

●Aileron/Elevator ● Port 3 (Aileron/Elevator servo output) selector switch

●Port 2 (2nd aileron or 2nd elevator/Gyro sensitivity input)

	● Gyro direction	● Port 1 (S.BUS input/
	switch
		Aileron and elevator
		input)
	● Trimmer	● LED
	(LIMIT/GAIN)
	(Digital/Analog
	servo function)
		Monitor LED display

Operation status	Color	Display	Remarks
1. No servo pulse /	Red	4 flash
sensor error
2. Start of initialization	Green	Fast blink

	Red/Green/	Steady	Mode Servo	Digital	Analog
3. End of initialization			AVCS	Red	Red
	Orange	light	Normal	Orange	Green

	4. Turn	Red/Green	Fast blink	Right (Green)
				Left (Red)
	5. Neutral deviation	Orange	Slow blink	When stick operated
	6. Gyro sensitivity zero		OFF
	7. Switch switching	Green	One blink	Each switching
	8. Low battery	Red	One flash	When power drops to 3.8V
				or less

Thank you for purchasing the GYA441 airplane gyro. Compact and lightweight, the GYA441 is designed to control the ailerons (roll axis) or elevators (pitch axis). Features include simple set-up and S.BUS/S.BUS2

connectivity.

GYA441 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: (1) Gyro sensitivity trimmer, (2) Monitor LED, (3) Two servos compatibility, (4) S. BUS/S.BUS2 compatibility, (5) Digital / analog servo function

Set Contents

The following items are supplied with the GYA441:

Mini screwdriver

GYA441

Extension cord: (Black)

			Extension cord: (Red)
Sensor tape

Magic strap (for clamping the wiring)

WARNING

Failure to follow these safety precautions may result in severe injury to yourself and others.

Check that there is sufficient transmitter battery capacity for flight.

•Determine the operating time of the receiver, gyro, and servo battery in the adjustment stage and decide the number of flights with a margin to spare.

Analog servos cannot be used while in "digital servo" mode.

• Analog servos may break down if "digital servo" mode is selected.

Do not operate the airplane and transmitter sticks for about 3-5 seconds after turning on the GYA441 (When shared with the receiver).

•GYA441 initialization and neutral position reading. The GYA441 is initialized when the power is turned on. In the AVCS mode, the neutral position is also read at the same time. If initialization ends normally, the operator is informed by two repetitive movements of the servo to the left and right (a little).

Always check the direction of operation of the gyro.

•Attempting to fly with the operating direction reversed is extremely dangerous. Always check your gyro's direction to ensure safe flights.

Do not strike the gyro with a hard object. Do not drop it onto a concrete surface or other hard floor.

•The sensor may become damaged during strong impacts.

Do not use trims or mixing in AVCS mode.

•In the AVCS mode all corrections are made by the gyro. Therefore, if trimming and mixing, are turned on, operation will be the same as deviating from the neutral position.

Do not use the GYA441 for applications other than RC airplanes.

•This gyro is designed for RC airplanes only. Do not use it for other applications.

Do not place gyro near heating equipment (engine, motor, ESC, battery, servo, etc.).

•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.

Connection

S.BUS Connection

	Extension cord: (Black)			To port 3	When there is 1
			Extension cord: (Black)		servo, port 2 is not
		To port 3		To port 2	connected.
	Aileron/Elevator CH	To port 1	To port 1		2ndservo
		To port 2	S.BUSReceiver
	Receiver

	Gyro sensitivity CH	GYA441	Aileron(Elevator)
		Accessory connector (Red)
			servo
	GyrogainCH(Receiver)←connect→Port2(GYA441)
	Remotegaine ective. Trimmer(GYA441)becomesLIMIT.

GyrogainCH(Receiver)←Itdoesnotconnect→Port2(GYA441)

Remotegainisinvalid. Trimmer(GYA441)becomesGAIN.

OnlyS.BUSiscompatiblewith1servo.

S.BUS/S.BUS2 port

GYA441 Aileron(Elevator)servo

At S.BUS/S.BUS2 operation, the channels are fixed as shown in the table below. Match the transmitter channels to these.

Function	Aileron mode	Elevator mode
Aileron	CH1
Elevator		CH2
2nd aileron	CH6
2nd elevator		CH9
Gyro sensitivity (Aileron)	CH5
Gyro sensitivity (Elevator)		CH7

	S.BUS 3-axes Connection Example
			S.BUS connection makes the wiring extremely simple.
			The GYA440 and GYA441 can be connected by one
			3-way hub. The aileron, elevator, and rudder servos
			are output from the gyro. Servos other than S.BUS ser-
			vos can also be used. When an R6303SB is used the CH
			switching mode is set to group 7. The normal group 7
This is a three axes			CH outputs are CH3, CH11, and CH12. CH3 is the throt-
connection example. The		Aileronservo	tle channel and CH11 and CH12 are spare channels.
rudder uses a GYA440 and	GYA441		The transmitter function settings are shown below. A
the receiver is an R6303SB.			total of 9 channels are used with three axes gyro con-
S.BUSReceiver			trol.	GYA441	GYA441	GYA440
			Function
				(aileron)	(elevator)	(rudder)
			Aileron	CH1
	GYA441		Elevator		CH2
S.BUS/S.BUS2 port			Rudder			CH4
		Elevatorservo
			2nd aileron	CH6
			2nd elevator		CH9
			Gyro sensitivity	CH5
			(aileron)
		Rudderservo	Gyro sensitivity		CH7
	GYA440(Soldseparately)		(elevator)
			Gyro sensitivity			CH8
			(rudder)

Mounting to the Chassis

The gyro is very sensitive to vibration. Securely mount it with the included double-sided sponge tape at a position where vibration is minimal and the gyro is perpendicular to the axis to be controlled. Since double-sided tape will not stick to balsa, make a smooth surface by cementing a smooth plastic sheet. to the frame and securely attach the gyro with double-sided tape. Provide a surplus in the wiring and bundle the wiring with the included magic strap so that it will not interfere with the rod.

	Sensor tape	GYA441 aileron mounting
		The turning direction which fixes the gyro can be any
	Degrease and stick
		direction up to 360° relative to the roll axis.

	Aileron control
Gyro	Elevator control
Controlled axis (roll axis)
90°	Rudder control
	(GYA440)
Flat surface of the fuselage to which
double-sided tape easily sticks
(double-sided tape does not stick to balsa)