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SCORPION HKIII-4020-1350KV | HK-4020-1350KV


Product Overview

The Scorpion HKIII-4020 Series Motor is designed for using on 550 class helicopters running on 6 to 8-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 550 class electric helicopter.Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.



  • Stator Diameter: 40 mm(1.57 in)
  • Stator Thickness: 20 mm(0.79 in)
  • No. of Stator Arms: 12
  • Magnet Poles: 10
  • Motor Wind: 2T/3T Delta
  • Motor Wire: 26-Strand 0.29mm
  • Motor Kv: 1350KV RPM/Volt
  • No-Load Current (IO/10v): 3.94 Amps
  • Motor Resistance (RM): 0.007 Ohms
  • Max Continuous Current: 90 Amps
  • Max Continuous Power: 1890 Watts


  • Weight 302 Grams: (10.65 oz)
  • Outside Diameter: 49.98 mm (1.97 in)
  • Shaft Diameter: 4.98 mm (0.20 in)
  • Body Length: 46.8 mm (1.84 in)
  • Overall Shaft Length: 78.7 mm (3.10 in)
  • Max Lipo Cell: 6s
  • Peak Current: 105 Amps (5 seconds)
  • Peak Continuous Power: 2200 Watts (5 seconds)
  • Motor Timing: 5deg
  • Drive Frequency: 8kHz
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