Scorpion HKIV-4025-520KV Brushless Motor

Product Description

From 2010 when Scorpion HKIII-40 series is released, a lot of feedback by World Champions and pilots in all facets of the hobby are received that they have well established themselves as the Gold Standard of R/C model power!

The HKIII-4025 series motors have proven themselves to be extremely successful in heli community and has become the most popular motor used in 500~600 class helicopters world-wide.

And now we are pleased to announce the release of the fourth generation HKIV-4025 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving 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!

Specifications

Scorpion HKIV-4025-520 Motor Specifications
Stator Diameter	40.0 mm (1.575 in)
Stator Thickness	25 mm (0.984 in)
Number of Stator Slots	12
Number of Magnet Poles	10
Motor Wind	6+7 Turn Delta
Motor Wire	1-Strand 1.20mm
Motor Kv Value	520 RPM per Volt
No Load Current (Io)	1.81 Amps @ 10 Volts
Motor Resistance (Rm) per Phase	0.022 Ohms
Maximum Continuous Current	65 Amps
Max Continuous Power (12-cell Li-Po)	2886 Watts
Motor Weight	347 grams (12.24 oz.)
Outside Diameter	49.50 mm (1.95 in.)
Shaft Diameter	5.98 mm (0.235 in.)
Shaft Length, From Mounting Face	30.6 mm (1.20 in.)
Motor Body Length	54.0 mm (2.13 in.)
Overall Shaft Length	84.6 mm (3.33 in.)
Max LiPo Cell	12s
Peak 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 Motor
3 x Female Connectors
3 x Connector Cover
4 x M3 Screws 
4 x M4 Screws

Weight including packaging

754g