Product overview
The Scorpion HKIV-4025-520KV is a brushless motor for helicopter propulsion, with the HKIV-40 series intended for 500-600 size models. Its electromagnetic architecture combines a 40 mm diameter, 25 mm thick stator with 12 stator arms and 10 magnet poles. A 6+7 Turn Delta winding uses single-strand 1.2 mm wire, and the motor constant is 520KV RPM/Volt. The supplied product is a motor component with connectors and mounting hardware, rather than a complete flight platform or airframe kit.
Mechanical integration must accommodate a 49.50 mm outside diameter, 54 mm body length, 5.98 mm shaft diameter and 84.6 mm overall shaft length. Motor weight is 347 Grams (10.58 oz). Electrical limits are 12s LiPo, 65 Amp maximum continuous current and 2886 Watt maximum continuous power; the 90 Amps and 3996 Watts peak ratings each carry a five-second limit. The box contains one motor, three 4mm AMASS connectors, three heat-shrink pieces, four M3 screws and four M4 screws.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | Scorpion HKIV-4025-520KV |
| Intended model size | 500-600 size model |
| 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 AmpsIO/10v |
| 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)5 seconds |
| Peak Continuous Power | 3996 Watts (5 seconds)5 seconds |
| Motor Timing | 5deg |
| Drive Frequency | 8kHz |
| Supplied configuration | 1 x Scorpion HKIV-4025-520kv BLDC Motor; 3 x 4mm AMASS Connectors; 3 x Heat Shrink; 4 x M3 Screws; 4 x M4 ScrewsIncluded equipment |
| Packaged weight | 754gIncluding packaging |
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