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
Stator Diameter
40 mm(1.57 in)
Stator Thickness
25 mm(0.98 in)
No. of Stator Arms
12
Magnet Poles
10
Motor Wind
4+4 Turn Delta
Motor Wire
1-Strand 1.6 mm
Motor Kv
850KV RPM/Volt
No-Load Current (IO/10v)
3.69 Amps
Motor Resistance (RM)
0.009 Ohms
Max Continuous Current
95 Amp
Max Continuous Power
2812 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
8s
Peak Continuous Current
110 Amps (5 seconds)
Peak Continuous Power
3256 Watts (5 seconds)
Motor Timing
5deg
Drive Frequency
8kHz
Included in the Box
1 x Scorpion HKIV-4025-850KV Motor 3 x Female Connectors 3 x Connector Cover 4 x M3 Screws 4 x M4 Screws