FlashHobby F4 FC + F55A ESC Stack - STM32F405, ICM42688, 60A BLHeli_S - FPV Racing

Introduction

The FlashHobby F4 FC + F55A ESC Stack is a high-performance integrated solution designed for demanding FPV drone builds. Combining a robust F405 flight controller with a powerful 55A 4-in-1 ESC, this stack provides the reliability and features needed for aggressive FPV racing and freestyle flying. Built for pilots who demand top-tier components, it ensures smooth flight and responsive handling.

Key advantages

• Integrated Flight Controller and ESC for a clean build.
• Powerful STM32F405 MCU and ICM42688 Gyro for precise flight control.
• High-current 55A 4-in-1 ESC supporting up to 6S LiPo for extreme power.
• Wide compatibility with DJI Air Unit (O3/RunCam Link/Vista) via 6-pin connector or direct soldering.
• Onboard BMP280 barometer for altitude hold capabilities.
• Multiple UARTs and I2C support for extensive peripheral connectivity.
• Durable 30.5x30.5mm mounting pattern for easy integration into most FPV frames.
• Built-in 16M Black Box for flight data logging.

Technical specifications

• Flight Controller (FC):
• Product Name: FLASH HOBBY F405 Flight Controller
• MCU: STM32F405
• IMU (Gyro): ICM42688
• USB Port Type: Type C
• Barometer: BMP280
• OSD Chip: BetaFlight OSD with AT7456E chip
• DJI Air Unit Connection: Supports 6-pin connector or direct soldering. Fully compatible with DJI O3/RunCam Link/Caddx Vista/DJI Air Unit V1.
• Black Box: 16M
• Current Sensor Input: Supported (Scale=180, Offset=0 for 50A ESC)
• Power Input: 3S - 6S LiPo (via 8-PIN ESC connector)
• 5V BEC Output: 5 outputs, 3A total current
• 9V BEC Output: 3 groups, 2.5A total current
• 3.3V BEC Output: 1 group, 300mA max current
• ESC Signal: M1 - M4
• UARTs: 6 sets (UART2, UART5, UART3), UART6 (SBUS), UART4 (ESC Telemetry), UART1 (VTX Setup)
• SBUS: Debugging to UART6 channel
• ESC Telemetry: UART R4 (UART4)
• I2C: Supported (SDA/SCL pads on front)
• LED Pad: Supported (5V, GND pads on bottom front)
• Buzzer: Supported (5V, BZ pads for 5V buzzer)
• BOOT Button: Supported (DFU mode, LED control)
• Flight Controller Firmware: BetaFlight (default)
• Firmware Target Name: STM32F405
• Mounting: 30.5 x 30.5 mm (4mm hole diameter)
• Dimensions: 37(L) x 37(W) x 6.6(H) mm
• Weight: 7.5g
• ESC (Electronic Speed Controller):
• Product Name: FLASH HOBBY BLS 60A 30.5x30.5 4-in-1 ESC
• Firmware: BLS 16.7
• Continuous Current: 60A * 4
• Burst Current: 65A (5 seconds)
• TVS Protection Diode: Yes
• External Capacitor: 35V560uF Low ESR Capacitor (included)
• ESC Protocol: DSHOT300/600
• Power Input: 3-6S LiPo
• Power Output: VBAT
• Current Sensor: Support (Scale=180 Offset=0)
• ESC Telemetry: Not Supported
• Mounting: 30.5 x 30.5 mm (4mm hole diameter)
• Dimensions: 42.3(L) x 37(W) x 6.2mm(H)
• Weight: 12g

Applications

This F4 FC and ESC stack is perfect for building custom FPV racing drones, freestyle quadcopters, and high-performance aerial platforms. It's suitable for drone enthusiasts looking to upgrade their current setup or build a new machine from scratch, offering the power and control needed for aerial acrobatics and competitive racing.

Compatibility

Mounting: Standard 30.5x30.5mm mounting pattern with 4mm diameter holes. Power: Supports 3S to 6S LiPo batteries. DJI Integration: Compatible with DJI O3 Air Unit, RunCam Link, Caddx Vista, and DJI Air Unit V1 via a 6-pin connector or direct soldering. Firmware: Primarily designed for BetaFlight, with STM32F405 target. ESC Protocol: Supports DSHOT300/600 for high-speed digital communication.

FAQ

What is the FlashHobby F4 FC + F55A ESC Stack best suited for?

The FlashHobby F4 FC + F55A ESC Stack is ideal for building custom FPV racing drones and freestyle quadcopters. Its robust features and high current handling make it suitable for pilots seeking reliable performance in demanding flight conditions.

Does this FPV stack support DJI digital FPV systems?

Yes, this stack offers excellent compatibility with DJI digital FPV systems. It supports connection to DJI O3 Air Unit, RunCam Link, Caddx Vista, and DJI Air Unit V1 via a 6-pin connector or direct soldering, simplifying your digital FPV setup.

What is the maximum LiPo voltage supported by this FlashHobby stack?

The FlashHobby F4 FC + F55A ESC Stack supports a wide input voltage range, from 3S to 6S LiPo batteries. This allows for powerful performance suitable for various FPV drone builds.

Where can I buy the FlashHobby F4 FC + F55A ESC Stack with fast delivery?

You can buy the FlashHobby F4 FC + F55A ESC Stack at HTDRONE. We offer fast shipping within Poland and reliable delivery to Ukraine via Nova Poshta, as well as worldwide shipping via DHL for international customers.

What are the key technical specifications of the FlashHobby F405 Flight Controller?

The F405 Flight Controller features an STM32F405 MCU, ICM42688 gyro, BMP280 barometer, and BetaFlight OSD. It includes a USB Type-C port, multiple UARTs, and supports 3-6S LiPo input.