User manual FUTABA GYA350

[. . . ] 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. Please write to Futaba if you feel that any corrections or clarifications should be made. 1 FOREWORD The GYA350 is a high-performance, compact, and light weight AVCS gyro developed for model airplane aileron, elevator, or rudder. [. . . ] In the AVCS mode, rudder operation is necessary when turning to prevent weathervaneing. Use the gyro in the Normal mode unless you are an expert in rudder operation. 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 GYA350 selector switches and trimmers. Connect the linkage so that the servo horns are as close to the center position as possible and the transmitter trimmers are also at the center position. 3. Gyro gain adjustment When the servo hunts, the gyro gain is too high. The gyro will display best performance at a gain just before Gyro gain trimmer hunting occurs. Rudder effect adjustment Control gain trimmer (C GAIN) Use the transmitter steering angle adjustment function to adjust the rudder effect. However, when the rudder effect is substantially different from that when the gyro was not mounted, adjust it with the control gain trimmer. 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. Standard Setting (Setting using all GYA350 functions) (Gain setting with T8UAPS example 2) The following describes how to use CH7 to switch the aileron and elevator gain and CH8 to switch the rudder axis gain. The aileron and elevator gyros gain switching connector is connected to receiver CH7 by branch cord. A FLAPRON compatible GYA351 is used to control the aileron axis, and to also control the air brake. When air brake is ON, the aileron and elevator axis gyros must be set to the Normal mode. 1. Call the transmitter PMIX-1 screen, and make the following settings: - Activate PMIX1. switch (CNT) When you want to set the gain of Normal the aileron and elevator gyros Air Brake independently, adjust the gyro gain trimmer on the gyros individually. 4. Call the transmitter PMIX-3 screen, and make the following settings: - Activate PMIX-3. The following examples assume that the GYA350 is installed in three axes. (Gain setting with T8UAPS example 1) The following describes how to use channels 5, 7, and 8 to switch the gain of the rudder, aileron, and elevator axis. 1. Call the transmitter 5ch ATV screen and make the following setting: - Set the CH5 switch rate for both directions to 70%. This sets the gyro gain to 50%. ·In the switch forward position, the gyro operates in the AVCS mode and in the switch backward position, the gyro operates in the Normal mode. 5. Call the transmitter PMIX-4 screen, and make the following settings: - Activate PMIX-4. This sets the rudder axis gyro gain to 50%. ·When SW-E is set to the forward, center, and backward positions, the GYA350 operates in the AVCS, OFF, and Normal modes, respectively. OFF AVCS 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. CH7 knob ·When switch SW-E is in the forward position, center position, and backward position, the GYA350 gyro operates in the AVCS, OFF, and Normal modes, respectively. OFF AVCS (Example of gain setting using T9ZAP) The following describes how to use vacant channels 5, 7, and 8 to switch the gain of the rudder, aileron, and elevator axes. FUNCT CTRL +T1 +J1 AIL +T3 +J3 ELE +T2 +J2 THR +T4 +J4 RUD +SF GEA +LD FLP +SE AU1 +SE AU2 TRM CTR SEL END 1. Call the transmitter function control functions screen, and make the following settings: - Set switch SF to GEA(5CH) and switch SE to AU1(7CH) and AU2(8CH), respectively. [. . . ] When using flight conditions, verify that the gyro monitor LED lights under all the flight conditions used. 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. [. . . ]