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A3 Mini User Manual V1.0
Thank you for purchasing our products. A3 Mini is a high-performance and functional 6-axis mini gyro and
stabilizer designed for R/C airplanes. The smaller size and more compact design make it more suitable
for the small electric airplanes. With the new feature of multi-protocol serial receiver support, it could be
compatible with most single line mini receivers on the market. In order for you to make the best use of
your gyro and to fly safely, please read this manual carefully and set up the device as described below.
32-bit MCU, high-precision 6-axis MEMS sensor, improved hardware platform and new firmware
solution provide more reliable performance.
6 flight modes, including GYRO-OFF, NORMAL, LOCK, ANGLE, LEVEL and HOVER modes.
PPM and multi-protocol serial receivers supported, including Futaba S.Bus, Spektrum DSM2/DSMX,
Spektrum SRXL, Multiplex SRXL/JR XBUS Mode B, Graupner SUMD, FlySky iBus, etc.
Flying-wing (Delta-wing), V-Tail, Remote Master Gain.
Firmware upgradable and Programming Card supported.
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 Mini 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.
OVERVIEW
Specifications:
Size:
30*19.5*7.5mm(L×W×H)
Weight:
4.8g (excluding wires)
Operating Voltage:
DC 3.6V-8.4V
Operating Current:
20mA@5V
Main Controller:
32-bit MCU
Sensors:
6-axis MEMS sensor
Installation
Use one of the supplied double-sided tape to attach the gyro to your airplane firmly. For best performance,
the gyro should be mounted as close to the C.G. as possible, and the housing edges must be aligned
exactly parallel to all three rotation axes of the airplane. The gyro can be attached flat or upright, and even
upside down, however, you have to ensure the arrow on the sticker always point to the heading direction.
①
Flat, face up
②
Flat, face down
③
Upright, button down
④
Upright Inverted, button up
Layout
Serial RX
Receiver signal input
AIL
Aileron Servo
ELE
Elevator Servo
RUD
Rudder Servo
AIL2
Second Aileron Servo
THR
ESC or Throttle Servo
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A3 Mini User Manual V1.0
Receiver CONNECTION
Serial Receiver Protocols Supported:
PPM Receiver
Futaba S.Bus (compatible with FrSky SBUS,
RadioLink SBUS and WFLY WBUS)
Spektrum DSM/DSMX 1024 Satellite Receiver
Spektrum DSM/DSMX 2048 Satellite Receiver
Spektrum SRXL
Multiplex SRXL /JR XBUS Mode B
Graupner SUMD
FlySky iBus
NOTES
A3 Mini uses the preset channel assignment to recognize the channels from the receiver:
AIL=CH1, ELE=CH2, THR=CH3, RUD=CH4, Mode=CH5, AIL2=CH6, Gain=None. You might
need to change the mapping to meet the function layout of your transmitter. Choose “None” for
those channels you do not want to use.
Please note that the remote master gain channel is disabled as default. Assign a channel number
for Gain channel to activate this feature if you need.
Pay attention to the polarity of the plugs. The Orange or White signal line must always be on the
inner side of the gyro.
You will need to purchase an optional adapter if you are using a Spektrum satellite receiver.
SERVOS CONNECTION
A3 Mini supports standard fixed-wing, flying-wing (Delta-wing) and V-tail. Connect the servos to the
corresponding connectors by following the illustration below.
NOTES
Always turn off the mixing functions on your transmitter, such as delta-wing or V-tail
mixings. All you need is to choose a single 4-channel fixed-wing model type without any mixings. Have
a look at the radio’s servo monitor and verify that each stick controls only one output channel.
Gyro Direction
After installation, lift the airplane up and make it quickly rotate around the roll, pitch and yaw axes
respectively. Make sure all the control surfaces react in the correct directions referring to the figures below.
VERY IMPORTANT!!!
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!
