Scorpion HKIV-4025-520KV

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Every new version of Scorpion Motors improves upon the previous versions, and now we are pleased to announce the release of the fourth generation HKIV-40 series motors. With the same motor design and materials of our World Championship Winning HKII-45 series, and single strand winding technique on this size of motor, it has better efficiency and power conversion than HKIII-40 series.

Additionally, the HKIV-40 series motors have an entirely new EM field design, which improves the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

The HKIV-40 series is exactly what you need for your 550-600 size model on 12s


Stator Diameter 40 mm(1.57 in)
Stator Thickness 25 mm(0.98 in)
No. of Stator Arms 12
Magnet Poles 10
Motor Wind 6+7 Turn Delta
Motor Wire 1-Strand 1.2 mm
Motor Kv 520KV RPM/Volt
No-Load Current (IO/10v) 1.81 Amps
Motor Resistance (RM) 0.022 Ohms
Max Continuous Current 65 Amp
Max Continuous Power 2886 Watt
Weight 347 Grams (10.58 oz)
Outside Diameter 49.50 mm (1.95 in)
Shaft Diameter 5.98 mm (0.24 in)
Body Length 54 mm (2.13 in)
Overall Shaft Length 84.6 mm (3.33 in)
Max Lipo Cell 12s
Peak Continuous Current 90 Amps (5 seconds)
Peak Continuous Power 3996 Watts (5 seconds)
Motor Timing 5deg
Drive Frequency 8kHz

Included in the Box

1 x Scorpion HKIV-4025-520kv BLDC Motor
3 x 4mm AMASS Connectors
3 x Heat Shrink
4 x M3 Screws
4 x M4 Screws

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