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Thank you for purchasing our products. A3 Pro V2 is a high-performance and functional 6-axis gyro
and stabilizer designed for R/C airplanes. In order for you to make the best use of your gyro and to
fly safely, please read this instruction manual carefully and set up the device as described below.
IMPORTANT NOTES
Radio controlled (R/C) models are not toys! The propellers rotate at high speed and pose
potential risk. They may cause severe injury due to improper usage. It is necessary to observe
common safety rules for R/C models and the local law. Read the following instructions
thoroughly before the first use of your gyros and setup the gyro carefully according to this
manual. We also recommend that you seek the assistance of an experienced pilot before
attempting to fly with our gyros for the first time.
After power on, A3 Pro V2 needs to perform an accurate gyroscope calibration, keep the
airplane stationary after power on and wait while the LED flashes blue. The LED will stay solid
blue if a slight movement is detected and the calibration will not start until you stop moving the
airplane, however, making the airplane level is NOT required during the initialization.
A stick centering is also required following the gyroscope calibration. Always put all the sticks
center (the throttle stick in the lowest position) before power on the airplane, and do not move
the sticks until the initialization is done.
Make sure to check the gyro direction of Aileron, Elevator and Rudder channels after installation
and always perform a test of them before each flight. An opposite reaction of the gyro could
lead to losing control or even crash!
It is recommended to use the supplied 3300uF/16V capacitor to get a more stable and secure
working voltage for the gyro. The capacitor can be plugged onto any one of the free connectors
of the gyro or receiver.
WWW.HOBBYEAGLE.COM
User Manual
V1.0 Jun, 2021 Revision
1 / 15

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Summary of Contents for HOBBYEAGLE A3 PRO V2

  • Page 1 V1.0 Jun, 2021 Revision Thank you for purchasing our products. A3 Pro V2 is a high-performance and functional 6-axis gyro and stabilizer designed for R/C airplanes. In order for you to make the best use of your gyro and to fly safely, please read this instruction manual carefully and set up the device as described below.
  • Page 2: Installation

    ANGLE, LEVEL and HOVER modes. ① Flat, face up ② Flat, face down ③ Upright, button up ④ Upright Inverted, button down WWW.HOBBYEAGLE.COM 2 / 15...
  • Page 3 When using a specific type of these receivers the appropriate type of receiver channel allocation will be preset in the A3 Pro V2. Please refer to the table below and check if WWW.HOBBYEAGLE.COM...
  • Page 4 Receiver Menu. If you use a standard PWM receiver with standard wiring layout the channel mapping does not apply. When A3 Pro V2 is operating in single line receiver mode, the [THR Out/AIL] can be used as the throttle output channel for the ESC or the throttle servo if a mini receiver is being used which has no additional output connectors.
  • Page 5: Flight Modes

    FLIGHT MODES A3 Pro V2 provides 6 flight modes which can be switched by a 3-position switch of the transmitter during flight. The factory default mode allocation of the switch is OFF - NORMAL - LEVEL. You can change the settings in the Setup Menu according to your needs.
  • Page 6: Gain Adjustment

    GAIN ADJUSTMENT Basic Gain There are 3 trimming potentiometers on the front of the A3 Pro V2. They are used to adjust the basic gain of the gyro for Aileron, Elevator and Rudder separately. Clockwise for increase, anticlockwise for decrease. Basic gain determines the momentary reaction strength of the gyro. In general, the higher the gain the harder the airplane will stop after rotation and the more stable and precise the airplane will fly.
  • Page 7: Setting Method

    Setup Menu level automatically. If you do not want to change anything, just wait for timeout without any operation. Exit of Menu To exit the menu keep the button pressed for 2 seconds again until the LED starts flashing White quickly. WWW.HOBBYEAGLE.COM 7 / 15...
  • Page 8: Setup Menu Table

    White, 9 flashes 10 Factory Reset White, 10 flashes 1. Wing Type A3 Pro V2 supports standard fixed-wing, flying-wing (delta- LED Color Description wing) and V-tail. After entering in this function, the color of LED shows you the wing type currently selected. The...
  • Page 9: Mount Orientation

    2. Mount Orientation A3 Pro V2 can be mounted flat or upright, and even upside LED Color Description down, however, you have to ensure the arrow on the sticker Solid Red Flat, Face up (default) always point to the heading direction. After entering in this...
  • Page 10 Quickly move the right wing downward around the roll axis, the right aileron surface should flap down and the left flap up as shown below. Check the gyro direction for Elevator Quickly move the nose of the airplane downward around the pitch axis, the elevator surface should flap WWW.HOBBYEAGLE.COM 10 / 15...
  • Page 11: Level Calibration

    5. Level Calibration When flying in ANGLE mode or LEVEL mode, A3 Pro V2 needs to know the angle of the airplane in both roll and pitch directions, this is achieved by calculating the attitude of its own. A small angle deviation caused by installation can lead to an unexpected behavior when flying in ANGLE mode or LEVEL mode.
  • Page 12: Gain Level

    Medium and Large. After you finish making your selection, just Solid Blue Large wait for 5 seconds until LED starts blink quickly which indicates that the modified is saved and then you will be brought back to WWW.HOBBYEAGLE.COM 12 / 15...
  • Page 13 To exit the menu just keep the button pressed for 2 seconds again until the LED starts flashing Violet quickly. After exiting the Receiver Menu, the gyro will start the initialization normally, so the new receiver settings will take effect immediately without restarting the gyro. WWW.HOBBYEAGLE.COM 13 / 15...
  • Page 14 LED starts flash Violet slowly. (FYA: Do not release the button when LED turns solid Violet yet, or you will get into the Receiver Menu but not the accelerometer calibration program.) WWW.HOBBYEAGLE.COM 14 / 15...
  • Page 15: Calibration Steps

    Calibration STEPS A3 Pro V2 uses a quick approach for accelerometer calibration, there are only 2 steps corresponding to both sides of Z axis of the unit required to be calibrated. Each step will take about 2 seconds. While calibrating, the LED will flash Blue several seconds and then light up solid in Blue. Do not move the gyro until the calibration is done.

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