Flight Stack HAKRC F4 55A

The HAKRC F4 55A flight stack is a compact and practical solution for pilots who need a balance of performance, stability, and affordability. It is a popular choice both for training drones and for working platforms where reliability and predictability are essential.

At its core lies the STM32F4 flight controller, a proven and reliable processor for FPV applications. Paired with a precise gyro, it ensures smooth response and predictable handling even during sharp maneuvers. Multiple UART ports are available for GPS, telemetry modules, and other peripherals, making the system flexible for different builds.

The power stage features a 55 A ESC, optimized for 4–6S LiPo batteries. It can withstand bursts up to 65 A, providing sufficient overhead for most motors on drones with 5–7 inch propellers. Running on BLHeli_32 firmware, the ESC supports modern protocols and advanced tuning options for greater control.

A built-in current sensor gives pilots real-time energy monitoring, which is particularly useful for long missions or when battery management is critical. An integrated LC filter further improves signal quality, ensuring stable operation with video transmitters.

With the standard 30.5×30.5 mm mounting pattern, the stack installs easily into most popular frames. At around 20 grams, it maintains a lightweight build without compromising durability. This makes the HAKRC F4 55A an excellent choice for pilots looking for a balanced and reliable stack for everyday flying, training, or cost-effective FPV builds.

Key Specifications:

• Flight Controller: HAKRC F4

• MCU: STM32F4

• Gyro: High-precision IMU

• UART Ports: Multiple (GPS, telemetry, peripherals)

• Blackbox: 16 MB

• LC Filtering: Integrated

• ESC: 55 A continuous / 65 A burst

• ESC Firmware: BLHeli_32

• Current Sensor: Built-in

• Input Voltage: 4–6S LiPo

• Mounting: 30.5×30.5 mm

• Weight: ~20 g (stack)