User manual FUTABA GYA352

[. . . ] Rate gyro for models 1M23N07408 AVCS RATE GYRO Thank you for purchasing a GYA352 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. [. . . ] Increase the travel width of the flight control surfaces so that they will not strike the linkage even when the servo is operated to its maximum deflection angle. ·Always use the miniature screwdriver supplied to operate the GYA352 selector switches and trimmers. Do not apply excessive force. When using the gyro mixng for Elevon/V-tail wing, this switch is set to the ON position. In this case, do not use the transmitter mixing function for Elevon/V-tail wing. In case of Elevon wing, always use the X-axis for the aileron control and the Y-axis for the elevator control. In case of V-tail wing, always use the X-axis for the rudder control and the Y-axis for the elevator control. The linkage of two servos must be symmetrical. If not, the gyro will operate in the wrong direction and result in a dangerous situation. When not using the gyro mixng, this switch is set to the OFF position. 6. (SW-E) 3. Lock the transmitter CH7 knob in the 0% position. This sets the X-axis gyro gain to 50%. ·When SW-E is in the forward, center, and backward positions, the GYA352 operates in the AVCS, OFF, and Normal modes, respectively. NORMAL 4. Rudder effect adjustment Use the transmitter steering angle adjustment function to adjust the rudder effect. Control Gain However, when the rudder effect is substantially different trimmer from that when the gyro was not mounted, adjust it with the (C GAIN) Control Gain trimmer. 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 rudder stick is set to its maximum position. When the control gain is increased, the rudder effect increases. (CH7 knob) OFF AVCS 4. Call the transmitter P-MIX3 screen, and make the following settings: - Activate P-MIX3. - Select switch direction DOWN. Standard Setting (Setting using all GYA352 functions) This standard setting controls gain switching and AVCS/ Normal gyro operation mode switching from the transmitter. However, two vacant channels are necessary to switch the gain and operation mode. 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 axis can also be switched simultaneously using a branch cord. (CH8 knob) 5. Call the transmitter P-MIX4 screen, and make the following settings: - Activate P-MIX4. Lock the transmitter CH8 knob in the 0% position. This sets the Y-axis gyro gain to 50%. ·When SW-E is in the forward, center, and backward positions, the GYA352 operates in the AVCS, OFF, and Normal modes, respectively. NORMAL OFF Mounting to fuselage and initial setting 1 Gyro mounting Install the gyro to the axis to be controlled in accordance with "Gyro Mounting Method". AVCS (Gain setting with T8UAPS or T9CAP example 2) The following describes how to use CH5 to switch the X-axis and Y-axis gains simultaneously. [. . . ] When using flight conditions, verify that the gyro monitor LED lights under all the flight conditions used. If the LED flashes twice, trim of that flight condition has changed. 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. Dead zone of servo operation A dead zone is produced in servo operation relative to stick operation. [. . . ]