This is the Scorpion V2 Series HK-2221-6 V2 brushless motor. Improvements include better cooling with the integrated centrifugal blower fan, higher efficiency with a new stator design and a new threaded-on flux ring for more solid construction.
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 N-50EH style, which 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 and a cross style backplate mount with 4 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 3.175mm shaft (1/8 inch).
Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. For the best overall combination of quality, performance, and value, give Scorpion Motors a try!
Stator Diameter: 22.0 mm (0.866 in)
Stator Thickness: 21.0 mm (0.827 in)
No. of Stator Arms: 9
No. of Magnet Poles: 6
Motor Wind: 6 Turn Delta
Motor Wire: 20-Strand 0.21mm (31 AWG)
Motor Kv: 4400 RPM / Volt
No-Load Current (Io): 2.89 Amps @ 10 volts
Motor Resistance (Rm): 0.016 Ohms
Max Continuous Current: 52 Amps
Max Continuous Power: 525 Watts
Weight: 79 Grams (2.79oz)
Outside Diameter: 27.9 mm (1.097 in)
Shaft Diameter: 3.17 mm (0.125 in)
Body Length: 33.6 mm (1.323 in)
Overall Shaft Length: 57.0 mm (2.244 in)