Happymodel Crux35 V2 3.5 Inch 4S Analog Freestyle Racing Drone w/ Caddx Ant Camera CrazyF411 ELRS Flight Controller - Frsky SPI

Recommend Battery: GNB 1100Mah 4S 15.2V 60C/120C Lihv Lipo Battery with XT30 Plug GAONENG GNB LiHV 4S 15.2V 850mAh 120C XT30 LiPo Battery Happymodel Crux35 / Crux35 HD / Crux35 HDZero FPV Drone NOTICE: SPI ELRS version (Crux35/HD/HDZero) has been discontinued. The new ELRS V2 version features the CrazyF411 ELRS AIO flight controller with UART ExpressLRS receiver. NOTICE: Loctite 222 is used on motor screws. Please take care when disassembling motors. Overview The Crux35 Series is an ultra-lightweight 3.5-inch BNF FPV freestyle drone built for performance. Weighing only 87g (analog) or 108g (digital), it delivers incredible thrust-to-weight ratio and freestyle capabilities. Powered by the EX1404 motors and HQProp tri-blade props, Crux35 offers a smooth and responsive flying experience. Ideal for freestyle, cinematic flying, or even racing. Versions Available Crux35 (Analog) with Caddx Ant camera and OVX303 VTX Crux35 HD with Caddx Nebula + Vista Kit Crux35 HDZero with HDZero Whoop VTX + RunCam HDZero Camera Receiver Options UART ExpressLRS 2.4GHz (V3.0.1, CRSF protocol) SPI FrSky D8/D16, S-FHSS compatible Main Features Ultra-lightweight 3.5-inch freestyle drone Supports HD, HDZero, and analog video transmission High-efficiency EX1404 3500KV motor Compatible with Naked GoPro or SMO 4K Recommended battery: 4S 750mAh (max: 4S 1100mAh) Specifications Wheelbase: 150mm Weight: 87g (Analog), 108g (HD) Size: 130x130x45mm (without propellers) Flight Time: 9–15 min (4S 750mAh) Flight Controller Options CrazybeeF411 ELRS (UART ELRS Version) MCU: STM32F411CEU6 Gyro: ICM42688P or BMI270 ESC: 20A 4-in-1 BLHeli_S BEC: 5V 1.5A Target: CRAZYBEEF4DX ELRS X1 (Discontinued) MCU: STM32F411CEU6 Gyro: MPU6000 ESC: 12A 4-in-1 BLHeli_S Target: CRAZYBEEF4SX1280 CrazybeeF411 FrSky (SPI) MCU: STM32F411CEU6 ESC: 20A 4-in-1 BLHeli_S Target: MATEKF411RX Motors Model: EX1404 KV3500 Configuration: 9N12P Stator: 14x4mm Weight: 9g Propellers Model: HQProp T3.5X2X3 Size: 3.5 inch, 3-blade Material: Polycarbonate Video Systems HD Version – Nebula Nano Kit Resolution: 720p60, latency 32ms Transmission Power: up to 700mW Range: Up to 4km HDZero Version Camera: RunCam Nano HDZero VTX: HDZero Whoop Resolution: 1280x720@60fps Analog Version Camera: Caddx Ant (1200TVL) VTX: OVX303 or OVX306 (0/25/100/300mW) What’s in the Package Crux35 Frame CrazyF411 ELRS / FrSky / ELRS X1 Flight Controller Motors: 4x EX1404 KV3500 Propellers: 4x CW + 4x CCW FPV System (depends on version) Screwdriver, battery strap Recommended Battery 4S 750mAh (Best Performance) Max Supported: 4S 1100mAh Note: Ensure correct VTX power settings for your region. Always verify Betaflight and ExpressLRS configurations before flight. Firmware Hex file (Betaflight official 4.3.1): Betaflight_4.3.1_STM32F411 Dump file: Betaflight 4.3.1 dump for Crux35 analog ELRS V2 Betaflight 4.4.2 dump file for Crux35 analog ELRS V2 If your Crux35 has high throttle oscillations, you can upgrade the flight controller firmware to 4.4.2 and then use this dump file to fix the problem. Betaflight 4.3.1 dump for Crux35 HDZERO and HD DJI ELRS V2 Manual: Crux35 Crux35HD DJI and Crux35 HDZERO FPV Racer Drone ELRS V2 manual Bind procedure video: