The FY-90Q controller is specially 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 FeiYu 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 Quad's four motor speed to maintain stability and balance. The FY-90Q supports two Flight Modes. Selection of Flight Modes is via a free channel on your Receiver: -Mode 1: Full Balance Mode: in this mode, the Quad flight is fully stabilized on all 3 axis, resulting in extremely leveled flight. Suitable for aerial photography, videography, FPV and beginner quad pilots. -Mode 2: Aerobatics Mode: In this flight mode, the controls to the Quad motors are very responsive. Specifically for skilled Quad pilots for sports flying, fast forward flights (FFF), stunts, etc. FY-90Q system is extremely easy to set up. The Quick Start Guide (below) is good enough to get the system flying. Relaxing and easy Quad flying is here at last !!
Specifications:                                                                      Instructiuni
Input voltage: 4.0 to 6.0 Volts
Weight (excluding wires): 20 g
Current draw: 52 mA (5V)
Size: 55 x 33 x 20 mm
Maximum rate of rotation: =500° /s
The FY-90Q supports two flight formats, "Cross" and "X"
The pulse signal output to control ESCs is between 900-2100us PPM pulses

Remote Control system requirement:

The FY-90Q has been tested to work with the following RC systems:
• Robbe-Futaba PPM/ PCM 1024/ PCM G3 mode/ 2.4 GHz systems
• Graupner JR PPM 8/ PPM 12/ SPCM mode
• MPX PPM8, PPM 12 with UNI mode
• Any remote control system using the standard of 1.5 ms neutral position.

Connection

The FY90Q supports two flight formats, “Cross” and “X”

  CROSS-TYPE QUAD LAYOUT
  a)Orientate the FY90Q so that the arrow points directly at Motor NO. 1.
  b)The characteristic of ‘Cross-Type’ layout is easier flight controls and faster     response to your flight commands.

  X-TYPE QUAD LAYOUT
  a)For X-Type Quad Layout, install the mixing jumper as shown here:

b)Orientate the FY90Q so that the arrow points between Motor No. 1 and No 4.