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Scorpion HKII-2221-10 Brushless Outrunner (Suits 450 Class Helis)

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Scorpion HKII-2221-10 Brushless Outrunner (Suits 450 Class Helis)


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Great upgrade motor for 450 class Helicopters suchs as the HK-450.

Scorpion HK 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 anodized 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 rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

All Scorpion HK Series 22mm motors come with 3.5mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller, heatshrink to cover the bullet connectors and mounting screws. Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend on running a prop on this motor, you will need to purchase a prop adapter for a 3.17mm shaft (1/8 inch).

Stator Diameter: 22.0 mm (0.87 in)
Stator Thickness: 21.0 mm (0.83 in)
No. of Stator Arms: 9
Magnet Poles: 6
Motor Wind: 10 Turn Delta
Motor Wire: 13-Strand 0.21mm
Motor Kv: 3000 RPM / Volt
No-Load Current (Io): 1.79 Amps @ 10 volts
Motor Resistance (Rm): 0.031 Ohms
Max Continuous Current: 42 Amps
Max Continuous Power: 550 Watts
Weight: 81 Grams (2.86 oz)
Outside Diameter: 27.9 mm (1.098 in)
Shaft Diameter: 3.17 mm (0.125 in)
Body Length: 38.3 mm (1.508 in)
Overall Shaft Length: 58.7 mm (2.311 in)
Max Lipo Cell: 4s
Motor Timing: 5deg
Drive Frequency: 8kHz

  • Kv(rpm/v) 3000.00
  • Max Current (Motor) (A) 42.00
  • Resistance (mh) 31.00
  • Max Voltage (V) 15.00
  • Power (W) 550.00
  • Shaft A(mm) 3.17
  • Length B (mm) 40.00
  • Can Diameter C(mm) 28.00
  • Can Length D(mm) 25.00
  • Total Length E(mm) 58.00

Dimension Diagram Guide

  • attributeset-10


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rocketscience | Verified Buyer

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Customer Rated

May 14, 2012

Use it in a stretched 450pro with 350/360mm blades on 4s 2200 with beastx. 13t pinion. Just gives and gives. Power is amazing, batteries are 30C and warm but not alarming. I DO oil it once every couple months. A bit more than equivalent motors here but quality and power don't disappoint.

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