User manual FUTUBA GYA351

[. . . ] 1M23N07404 Thank you for buying a GYA351 AVCS gyro. 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. [. . . ] When the gyro is turned on, the rudder will feel sluggish. Adjust the control gain so that the rudder effect matches the rudder effect when the stick is set to its maximum position. When the control gain is increased, the rudder effect increases. Use this setting method when there is no vacant receiver channel. Use the GYA351 in the Normal mode only. Standard Setting (Setting using all GYA351 functions) Mounting to fuselage and initial setting 1. Gyro mounting Mount the gyro to the axis in accordance with "Gyro Mounting Method". This standard setting controls gain switching and AVCS/ Normal gyro operation mode switching from the transmitter. However, when using the GYA351 with its GYA350 sister product, and mounting gyros in three axis, three vacant channels are necessary for gain and operation mode switching. When there are not enough vacant channels, do not connect the gain switching connector and operate the gyro in the Normal mode only. The gain of the gyros of two axes can also be switched simultaneously by using a branch cord. 2. Gyro connection · Connect to the receiver output of ch1. · Do not connect the gain switching connector. · Connect to the receiver output of ch6. · Ch1 servo. Mounting to fuselage and initial setting 1. Gyro mounting Install the gyros to the axes in accordance with "Gyro Mounting Method". · Ch6 servo. 2. Gyro connection · Connect to the receiver output of ch1. · Connect to the gain switching channel. · Connect to the receiver output of ch6. · Ch1 servo. 1. Call the transmitter PMIX-1 screen, and make the following settings: - Activate PMIX1. - Select switch direction UP . · Ch6 servo. When there is no vacant channel that can be used for gain switching, "Standard setting" cannot be performed. - Select switch direction UP . Normal 2. Call the transmitter PMIX-1 screen, and make the following settings: - Activate PMIX1. 3. Call the transmitter PMIX-2 screen, and make the following settings: - Activate PMIX-2. 4. Lock the transmitter CH7 knob in Normal the 0% position. [. . . ] This ends AVCS side setting. Neutral check method In the AVCS mode, the servo does not return to the neutral position even though the stick is returned to neutral. When you want to check the servo neutral position during linkage neutral check, etc. , set the gain switch to the Normal position, or quickly move the transmitter stick to the left and right at least three times and immediately return the stick to the neutral position. A dead zone is produced in servo operation relative to stick operation. However, this is because the stick control gain rises and is not an abnormality. Mounting Precautions Always use the accessory sensor tape to install the gyro to the fuselage. This is necessary to securely fasten the gyro to the fuselage so that operation of the gyro does not transmit unwanted fuselage vibrations directly to the sensor. and turn on the transmitter power switch, then turn on the gyro power. When using the gyro in the AVCS mode, turn off mixing. For example, if elevator down mixing is used by the air brake, the gyro will judge that an elevator down signal was received and will cause the aircraft to dive. [. . . ]