IMU stabilizer with functions like:
- Auto stabilizing
- Return to Home function
- Auto circle over given position
- Hold altitude
- RC normal flight.
Mode 1: Closed mode: All control of the model plane is determined by the manipulator. FY-21A passes through all RC commands to the model. Full control of the airplane is in the hands of the operator.
Mode 2: Auto balance mode: In this mode, if FY-21AP senses the change of flying attitude, it will give a control gain to amend the plane automatically into a horizontal flying attitude. This is of course for roll and pitch.
Mode 3: Fixed–Altitude fly Mode: For this mode it is just like auto balance mode with the exception that it will also will take the current altitude as the target altitude and maintain this elevation. The operator needs only to control the direction of the plane with no worries as to the planes altitude changing.
Two Special Modes:
Special Mode 1: Auto Return Mode .In this mode, the plane flies to the return point automatically. The system will take the the current altitude (at the time special mode 1 was selected) as the target altitude and keep flying in this height. The plane will then return to the home position and circle around that point in a radius of 120m.
Special Mode 2: Auto Circling Mode. In this mode, the plane will circle its current position. The system will take the current altitude (at the time special mode 2 was selected) as the target altitude and keep flying in this height. The plane will then circle around that point in a radius of 120m
Special Mode off: when the three way toggle switch is in the middle this means the special mode function is off.
These modes are controlled by two separate channels on your receiver.
The FY21AP system consists of:
1. FY 21 AP-Ⅱ
2. FY OSD-Ⅱ
3. FY DL 100A (Current Sensor)
4. FY GPS (10HZ GPS module)
The system is a very good place to start out. It's more or less PnP and very easy to tune the gains. It's not an Autopilot where you can add waypoints, but you can switch into auto circle mode at any given point in your flight and if you loose video signal you can switch into Auto return home.
You can read a review of the system on RCG made by Steve from Canada. Review FY 21 AP
Here you have the FY 21AP manual
It's available here FY 21 AP