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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-4020 series motors have proven themselves to be extremely successful in heli community, and has become the most popular motor used in 400~500 class helicopters world-wide.
And now we are pleased to announce the release of the forth generation HKIV-4020 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!
| Stator Diameter | 40 mm(1.57 in) |
| Stator Thickness | 20 mm(0.79 in) |
| No. of Stator Arms | 12 |
| Magnet Poles | 10 |
| Motor Wind | 3+4 Turn Delta |
| Motor Wire | 1-Strand 1.7mm |
| Motor Kv | 1320KV RPM/Volt |
| No-Load Current (IO/10v) | 5.74 Amps |
| Motor Resistance (RM) | 0.006 Ohms |
| Max Continuous Current | 90 Amps |
| Max Continuous Power | 1998 Watts |
| Weight | 310 Grams (10.94 oz) |
| Outside Diameter | 49.50 mm (1.95 in) |
| Shaft Diameter | 4.98 mm (0.20 in) |
| Body Length | 49.2 mm (1.94 in) |
| Overall Shaft Length | 80 mm (3.15 in) |
| Max Lipo Cell | 6s |
| Peak Continuous Current | 105 Amps (5 seconds) |
| Peak Continuous Power | 2331 Watts (5 seconds) |
| Motor Timing | 5deg |
| Drive Frequency | 8kHz |
1 x Scorpion HKIV-4020-1320KV Motor
3 x Female Connectors
3 x Connector Cover
4 x M3 Screws
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