HappyModel Crux35 Analog 4S Micro 3.5 Inch Freestyle FPV Racing Drone ELRS

  • $135.00
  • Save $16

HappyModel Crux35 Analog 4S Micro 3.5 Inch Freestyle FPV Racing Drone BNF ELRS

CRUX35 is an ultra-lightweight 3.5Inch FPV Freestyle FPV Racing Drone, the weight of the whole drone is only 87g for the analog version. The Crux35 serials drone use Happymodel EX1404 high-efficiency motor and HQPROP 3.5-inch three-blade propeller to ensure the largest thrust-to-weight ratio under the most efficient premise, which can bring you a smooth Freestyle flying experience.

The analog version is equipped with a CADDX FPV ANT camera.


  • Ultra-lightweight 3.5-inch BNF FPV Freestyle Drone
  • Analog video transmission is optional
  • Integrated ExpressLRS SPI receiver or Frsky SPI D8/D16 receiver
  • High-efficiency EX1404 power system
  • Can be equipped with Naked Gopro or SMO4K
  • Support 3-4S battery 4S 750mah battery is recommended, maximum support 4S 1100mah(The battery is not included)


  • Brand: Happymodel
  • Product name: Crux35
  • Wheelbase: 150mm
  • Weight: Crux35 87 gram
  • Size: 130mmx130mmx45mm (without propellers)
  • Receiver option: SPI Frsky D8/D16
  • Camera: Analog version Ant + OVX303 VTX
  • Flying time: 9min~15min 4s 750mah battery(The battery is not included)



  • Mode: EX1404
  • KV options: KV3500
  • Configu-ration: 9N12P
  • Stator Diamter: 14mm
  • Stator Length: 4mm
  • Shaft Diameter: Φ1.5mm
  • Motor Dimension(Dia.*Len): Φ15mm*15mm
  • Weight(g): 9g



  • Propeller Diameter: 3.5 inch       
  • Pitch: 2              
  • Blades: 3
  • Material: Poly Carbonate        
  • Weight: 1.5g
  • Hub Diameter: 10mm           
  • Hub Thickness: 4.7mm           
  • Shaft: 1.9/1.5/1.9mm
  • Adaptor Rings: NO


Flight Controller (Frsky version)

  • MCU: STM32F411CEU6 (100MHZ, 512K FLASH)
  • Sensor: MPU-6000(SPI connection)
  • Board size: 28.5 * 28.5MM
  • Power supply: 2-4S battery input (DC 8V-17V)
  • Built-in 20A(each) Blheli_S 4in1 ESC Dshot600 ready
  • Built-in Frsky D8/D16 SPI receiver
  • Built-in 2.4G Power Amplification
  • Built-in Betaflight OSD(SPI Control)
  • Built-in Current meter
  • Built-in 5V 1.5A BEC
  • Built-in voltage detection
  • Firmware target: MATEKF411RX


Onboard 4in1 ESC

  • MCU upgraded to EFM8BB21
  • Power supply: 1S LiPo/LiPo HV
  • Current: 5A continuous peak 6A (3 seconds)
  • Support BLHeliSuite programmable
  • Factory firmware: O_H_5_REV16_8.HEX
  • Default protocol: DSHOT300

Onboard SPI Frsky 2.4GHz Receiver (Frsky Version)

  • SPI BUS receiver
  • Frsky D8/D16/EU-LBT/, Futaba S-FHSS switchable on Betaflight
  • Channels: 8ch/16ch
  • Dual antenna
  • Failsafe support
  • No ground interference ( Transmitter and receiver 1 m from the ground): 400m


Caddx ANT 1200TVL Camera (Analog version)

  • Image Sensor: 1/3" CMOS Sensor
  • Horizontal Resolution: 1200 TVL
  • TV System: NTSC or PAL 
  • IMAGE: 16:9 or 4:3
  • Synchronization: Internal
  • Electronic Shutter: PAL: 1/50~100,000; NTSC: 1/60~100,000
  • S/N Ratio: >52dB (AGC OFF)
  • Video Output: CVBS
  • Lens: 1.8mm
  • Min. Illumination: 0.001Lux@F1.2
  • Auto Gain Control: YES
  • BLC: YES
  • WDR: Global WDR
  • DNR: 3D DNR
  • Dimensions: 14*14mm(with a bracket to 19*19mm)
  • Wide Power Input: DC 3.7-18V
  • Work Temperature: -20℃~+60℃
  • Weight: 2g (N.W.)


OVX303 5.8Ghz VTX (Analog version)

  • Model: OVX303
  • Frequency: 5.8G 40CH
  • Transmitting Power: 0/RCE/25mw/100mw/300mw
  • Power supply: DC 5V
  • Current (5v): <650ma (300mw)
  • Weight: 1.5gram without antenna


Package Included:

  • 1x Crux35 Frame
  • 1x CrazyF411 flight controller
  • 1x Analog FPV Camera Caddx ANT
  • 1x Happymodel OVX303 5.8G analog VTX
  • 4x Happymodel EX1404 KV3500 Brushless Motor
  • 1x HQProp T3.5X2X3Grey (4cw+4ccw)
  • 1x Screw Driver
  • 1x Buckle Velcro for battery

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