iFlight Borg 5S RX ELRS Stack with Borg 60RS ESC (20x20)

The iFlight Borg stack pairs the Borg 5S RX flight controller, which carries its own ELRS 2.4GHz receiver with an integrated antenna, with the Borg 60RS 4-in-1 ESC on a 20 × 20 mm mount. It is aimed at FPV racing quads on 4S to 8S (LiHV supported), and the onboard receiver saves a separate RX board and its wiring; an external receiver can still be connected if you prefer.

Key features

• AT32F435 flight controller: ICM42688 gyro, AT7456E analog OSD and 16MB blackbox flash, running Betaflight on the IFLIGHT_BLITZ_ATF435 target.
• 60A 4-in-1 ESC: 60A continuous and 65A burst (10 s), BL32 32-bit firmware with bidirectional DShot for Betaflight's RPM filter.
• Switchable 12V VTX power: a 12V 2A BEC that can be turned on and off from the radio, plus a 5V 2.5A rail for peripherals.
• Analog and digital video ready: VTX control over DJI MSP, SmartAudio, IRC Tramp and HDZero.
• Clean connections: FPC cable between FC and ESC, SH1.0 plugs on the other interfaces.

Specifications

• MCU: AT32F435RGT7
• Gyro: ICM42688
• OSD: AT7456E
• Blackbox: 16MB flash
• Barometer: None
• UARTs: 4
• Motor outputs: 4
• I2C: Not supported
• Firmware target: IFLIGHT_BLITZ_ATF435 (Betaflight)
• Receiver: Built-in ELRS 2.4GHz
• BEC: 5V 2.5A; 12V 2A (switchable)
• Input voltage: 4–8S LiPo/LiHV
• ESC current: 60A continuous, 65A burst (10 s)
• Mounting: 20 × 20 mm
• FC size: 34 × 28.5 mm
• FC weight: 6.8 g

iFlight's suggested wiring: UART1 for the HD or analog VTX, UART2 for ESC telemetry, UART4 for the built-in receiver or SBUS input, and UART5 for GPS. With no I2C bus there is no way to add a compass or external barometer, so plan any GPS use around Betaflight's compass-free GPS Rescue.