Eachine Fatbee FB90

The Eachine Fatbee FB90 is a bind and fly quadcopter built by Eachine. The quad is based on the SP Racing F3 EVO flight controller enabling use of Cleanflight/Betaflight. Angle, Horizon, and Acro are all features that can be enabled in CF/BF.

Fatbee FB90

Features

• Wheelbase: 90mm
• Size: 118*118*70mm
• Weight: 42g (without battery)
• 63g (included battery)
• Flight controller: SP RACING F3_EVO_Brush
• Motor: 8520 2S Brush Motor (3 – 8.4V)
• Prop Size: 40mm
• Camera: 520TVL HD CMOS 1/4 inch Camera
• Video Output format: PAL / NTSC
• AV Wireless Transmitter: 5.8g 25mw 48CH
• Battery: 7.4V 2S 400mah 25C Lipo battery
• With LED_Strip function

F3 Brushed Flight Controller:

• It can be powered by up to three LiPo cells
• Supports signal input of PPM, SBUS, DSM/DSM2/DSMX receivers
• Cleanflight ready, Betaflight compatible
• Acro flight mode / Air flight mode / Angle flight mode
• STM32F303 MCU
• MPU6500 ACC

Receiver Option:

1. 8CH Sbus output Frsky D8 Mode Receiver
2. 6CH PPM output Flysky AFHDS Mode Receiver
3. 6CH DSM2 output Spektrum compatible Receiver

Package Included

Package included:

• 1 x FB90 Frame kit
• 4 x 8520 2S Coreless Motor
• 2 x 8520 2S Coreless Motor Spares
• 1 x F3_EVO_Brush Flight controller
• 1 x Receiver
• 1 x 5.8G VTX w/Camera antenna
• 4 x 40mm Propeller Black
• 4 x 40mm Propeller Yellow
• 2 x 7.4V 400mah Battery
• 1 x USB Charging cable
• 1 x Paddle propeller
• 1 x LED Light Set

Not Included

• Micro USB cable (needed to connect to CF/BF)

Getting Started

PDF Manual

Frsky

1. Charge battery
2. Transmitter: Create new model on the transmitter by pressing Menu => Page => Select an empty slot and press ENT => Create New Model => Select Quadcopter with default settings
3. Transmitter: Under Internal RF, select D8 mode
4. Transmitter: Page over to INPUTS => Select 05 => "Input name" name to "arm"=> Select source and flip the SA switch to set SA to arm/disarm => Exit => Exit
5. Transmitter: Page to Mixer => CH5 => ENT => "Mix name" set to ARM ("Source" should already be set to "INPUT" named arm) => Exit to home
6. FB90: Props are prone to fly off upon first use. Press down the props with moderate force to leave less than 1mm gap.
7. FB90: Jump (short) two bind solder pads with the included metal prop remover--with the USB port at the rear, the labeled "Bind" is located on the top right corner of the board. The green LED will be SOLID.
8. FB90: The green LED will turn off once the bind is successful
9. Use included tape for battery and FB90
10. Fly

Setting Failsafe

Set failsafe in Flight Controller

Cleanflight failsafe setup https://www.youtube.com/watch?v=dikr9oDzQqc

Parts & Accessories

Suggested list of parts and accessories

Replacement Parts

4 Prop set [1]

2S 7.4V Lipo Battery [2]

Prop saver replacement [3]

3D print prop saver by NiklasHasforth Thingiverse

8.5x20mm Coreless Motor [4]

CF frame [5]

Body shell [6]

FC F3 Evo Brushed [7]

Camera mount [8]

LEDs [9]

Accessories

B6AC Charger BANGGOOD or Turnigy Reaktor Charger HOBBYKING

Balance Charge Cable for 5 batteries at a time [10]

Balance Charge Cable for 3 batteries at a time [11]

FPV Goggles or Display

Batteries to power up VRx

Receiver

When purchasing, there are 3 options for selecting a receiver:

• DSM
• Flysky
• Frsky

PIDS

PIDS are highly dependent on flight setup, which includes props, battery size, externally mounted camera, etc. and also when new firmware versions are released. With each component change, the values in gyro filters and/or other features will be needed to tune again. The user postings of PIDS is to provide an approximate value covering a specific flight setup, so that pilots can tune further from there.

BetaFlight

Firmware Installation

1. Remove all props (props spun up after intial flashing with only USB connected)
2. Download Betaflight using Google Chrome https://chrome.google.com/webstore/detail/betaflight-configurator/kdaghagfopacdngbohiknlhcocjccjao?hl=en
3. Download Zadig driver http://zadig.akeo.ie/
4. FB90: Short boot pins located in the center of the board (top), this will put the board into DFU mode. If you're in DFU mode, the blue LED will be OFF.
5. Zadig: Options => List All Devices => Select STM32 Bootloader, WinUSB => Click "Replace Driver"
6. Open Betaflight => Firmware flasher => The COM port will display as DFU
7. Select SPRACINGF3EVO, No reboot seq, flash on connect, Full chip erase, Manual baud 256000
8. Flash firmware
9. Motors may spin up afterwards. To stop this, go to the configuration tab and select ESC/Motor protocol as BRUSHED. Enable MOTOR_STOP. Save and reboot.

PIDS

PIDS are highly dependent on flight setup, which includes props, battery size, externally mounted camera, etc. and also when new firmware versions are released. With each component change, the values in gyro filters and/or other features will be needed to tune again. The user postings of PIDS is to provide an approximate value covering a specific flight setup, so that pilots can tune further from there.

Troubleshooting

Tilt/drift

If the quad tilts/drifts, even after setting trim on the transmitter, the accelerometer will need to be calibrated.

Accelerometer calibration

1. Open Cleanflight
2. Connect micro USB to FB90
3. Setup
4. Lay the quad on a flat surface
5. Calibrate accelerometer