HS-6403-HV KD2 Standard Size Full Aluminum Servo


  • Developed and tuned by World Champion Helicopter Master, Kyle Dahl.
  • All new software algorithm with the best "connection" with your helicopters.
  • All new motor and gear set design with enlarged 2mm gear alignment pins for better durability under impact.
  • Auto Adaptive DUAL BAND (760/1520us)
  • Auto Adaptive FREQUENCY RANGE (50-1000Hz)
  • Quick release cable that allows easy and quick installation for all helicopters.
  • Brushless motor design provides extremely high speed, top efficiency, and low power consumption.
  • 4096 resolution and SIC (Single Integrated Circuit) for the highest performance and durability.
  • All Aluminum case for the best thermal dissipation and durability.
  • High-Speed, High-precision 12-bit AD converter and CPU calculation
  • Fail safe
  • Over current protection
  • Over temperature protection
  • Start sonorant


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Type Standard
Product Name HS-6403-HV KD2 Standard Size Full Aluminum Servo
Part Name HS-6403-HV
Power Supply 7.4V~8.4V (0.2A~5A, max 6A)
Speed (sec/ 60°) @7.4V: .07 sec/60° @8.4V: .062 sec/60°
Torque (oz/in) @7.4V: 366.85 oz-in @8.4V: 416.40 oz-in
Torque (kg/cm) @7.4V: 26.43 kg-cm @8.4V: 30.00 kg-cm
Dimensions 40x40.5x20 mm
Weight 73.2g
Range Auto Adaptive FREQUENCY RANGE (50-1000Hz)
Center Position Auto Adaptive DUAL BAND (760/1520us)
Applications Helicopter Cyclic