RadioMaster Nexus-X Helicopter Flight Controller
by RadioMaster

The RadioMaster Nexus-X Helicopter Flight Controller (Gray) is a high-performance Flybarless (FBL) control system engineered from the ground up for the Rotorflight 2.2 ecosystem. Powered by a high-speed STM32F722 MCU and equipped with the precision ICM42688P 6-axis MEMS motion tracker, the Nexus-X delivers ultra-stable flight dynamics and lightning-fast processing for helicopters ranging from 250 to 700 class machines. Housed in a premium CNC-machined aluminum case, it provides exceptional structural protection and thermal management for the internal electronics.

Designed for professional heli-pilots, sUAS researchers, and tactical developers, the Nexus-X prioritizes versatility and clean integration. It features five multi-function UART ports and a specialized solder-free Plug’n’Play port for RadioMaster RP3-H ExpressLRS receivers. With its integrated 256MB Black Box memory, pilots can log extensive flight data for precision PID tuning and performance analysis. The unit also features isolated power supplies to minimize electrical noise and supports high-voltage 12V servos, making it a robust central hub for modern, high-performance helicopter builds.

Specifications

• Firmware: Rotorflight 2.2 (Reference Design)

• Microcontroller (MCU): STM32F722RET6

• Gyroscope/Accelerometer (IMU): ICM42688P

• Flash Memory (Black Box): 256MB (W25N02KVZEIR)

• Barometer: SPL06-001

• UART Ports (5): S.BUS [UART1], TELEM [UART2], PORT-A [UART4], PORT-B [UART6], PORT-C [UART3]

• Servo Channels (4): S1, S2, S3, TAIL (Supports up to 12V)

• RPM Sensor: Dedicated input from ESC frequency sensor

• Receiver Support: CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP

• Supply Voltage (DC): 5V – 16V

• External Voltage Telemetry: 3.6V – 70V Input

• Dimensions: 44.70 x 26.50 x 12.30 mm

• Weight: 20.6g

What is Included

• 1x RadioMaster Nexus-X Helicopter Flight Controller (Gray)

• 3x JST-GH 4-Wire Pigtail Cables

• 1x JST-GH to Servo Plug (Dupont 3-pin connector)

• 1x Ultra Lightweight and Flexible USB-C Extender

• 1x Type-C Extension Cable

• 1x JST-ZH1.5 "DSM" Telemetry Cable (Telemetry only)

• 1x Voltage Telemetry Wire

• 3x 3M Double-Sided Mounting Tape

• 2x Heat Shrink Tubing