Updated in the Pro Edition:

• Firmware Upgradable!
• Even better flight stability and maneuverability!
• Flight Parameters adjustable!
• Fututre firmware updates may allow 2-Rotor to 8-Rotor - X2, Y3, X4, Y6, X8

CLICK HERE for the FY-90Q Pro forum on RC Groups

The FY-90Q controller is specifically designed for QuadCopter use.  The Attitude Flight Stabilization System (AFSS), which is the heart of the FY-90Q, is an integrated 3-axis gyroscope and 3-axis accelerometer.  AFSS forms a comprehensive inertial based navigation platform that calculates 3D flight attitude using proprietary FY Tech algorithm.  When in Full Balanced-Mode (Mode 1), the AFSS detects any changes to the model's horizontal attitude. If attitude change is detected, the unit will send out controlling signals to change the Quadʼs four motor speed to maintain stability and balance.

• FY-90Q ALL-IN-ONE THREE  (3) AXIS CONTROLLER The FY90Q is a four ESC controller designed for the increasingly popular Quadrocopter RC aircraft market.
• By using precision control technology using gyros and accelerometers, FeiYu Tech have achieved flight stability never seen before in these aircrafts
• Whether you are flying for fun or using Quads as a professional, the FY90Q is the solution you've been waiting for
• FY-90Q accept simple ESC for r/c planes so the size and weight lifting is no longer a problem!
• Ultra-stable vertical take-off and landing. Easy forward flying with precision auto stabilization. Simple to install and easy to operate

Technical Specification and working requirements:
Input voltage : 4.0 to 6.0 Volts
Current draw : 52mA (5V)
Size : 55 x 33 x 20 mm (2.17 x 1.3 x .79 in)
Weight (excluding wires) : 20g (71oz)
Temperature range :-25°C~+70°C (-13°F~+150°F)
Maximum rate of rotation : ≤ 500 ° / s
The FY90Q supports two flight formats,
“Cross” and “X” (see section on Flight Format).
The pulse signal output to control ESCs is between 900-2100μs PPM pulses

The FY-90 Controller is purpose built for Quadcopter use.

The Attitude flight stabilization system (AFSS), which is the heart of the FY-90Q, is an integrated 3-axis gyroscope and 3-axis accelerometer. AFSS forms a comprehensive inertial based navigation platform that calculates 3D flight attitude using proprietary FeiYu Tech algorithms.

When in full balance mode, the AFSS detects any changes to the models horizontal attitude. If an attitude change is detected, the unit will send out controlling signals to change the rotational speed of the Quadcopters motors to maintain stability.

The FY-90Q system features 2 flight modes.

Mode 1: Full Balance mode, in this mode the Quadcopters flight is fully stabilized on all 3 axis, resulting in extremely leveled flight. Suitable for Aerial photography, video, FPV and beginner Quadcopter Pilots.

Mode 2: Aerobatics mode, in this mode the control signals to each motor are very responsive. This mode is specifically for skilled Quadcopter pilots who want fast forward flight etc.

Specs.
Input Voltage: 4v~6v DC
Current Draw: 52mA (5v)
Size: 55 x 33 x 20mm
Weight: 20g
Max rate of rotation: <500deg / S