Product Description

Since 2007 when the Scorpion HK-40 series was released, till present, having been used by Multiple World Champions, and pilots in all facets of the industry, Scorpion Power System has established itself as the Gold Standard of industrial UAV / RC hobby power!

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 500-600 size model.

Specifications

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

Weight including packaging

754g