Product overview
The Scorpion HKII-4525-520KV – ULTIMATE (6mm 35mm) is a brushless propulsion motor intended for 700-class RC helicopters. Its construction combines CNC-machined aluminum alloy parts with a gold electro-coated finish, an epoxy-coated stator using 0.2mm laminations, and single-strand 1.4 mm winding wire. The winding wire carries a 180 degrees C (356 F) rating. Internally, the motor has a 45 mm stator diameter, 25 mm stator thickness, 12 stator arms, 10 stator poles, and a 5+6T YY winding.
Installation space must accommodate a 56.9 mm outside diameter, 57.7 mm body length, and 92 mm overall shaft length; the specified shaft diameter is 5.98 mm. Motor weight is 516 Grams (18.20oz). Electrical limits are 12s LiPo, 100 Amps continuous current, and 4450 Watts continuous input power. Peak inputs of 230A and 10200 Watts are limited to 2 seconds. Integration settings are 5deg to 15 deg timing and 8kHz drive frequency. Installation requires clearance between the pinion and main gear, while each bearing needs a small drop of oil every 5-6 flights.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HKII-4525-520KV – ULTIMATE (6mm 35mm) |
| Application and product type | Brushless motor for 700-class RC helicopter propulsion. |
| Construction | CNC-machined aluminum alloy parts with a gold electro-coated finish. |
| Stator construction and winding insulation | 0.2mm stator laminations, epoxy-coated stators, and winding wire rated at 180 degrees C (356 F). |
| Stator Diameter | 45 mm (1.77 in) |
| Stator Thickness | 25 mm (0.98 in) |
| No. of Stator Arms | 12 |
| No. of Stator Poles | 10 |
| Motor Wind | 5+6T YY |
| Motor Wire | 1-Strand 1.4 mm |
| Motor Kv | 520KV RPM/Volt |
| No-Load Current (Io/10V) | 1.81 AmpsAt 10V. |
| Motor Resistance (RM) | 0.012 Ohms |
| Max Continuous Current | 100 AmpsContinuous operation. |
| Max Continuous Power | 4450 WattsContinuous input power. |
| Weight | 516 Grams (18.20oz) |
| Outside Diameter | 56.9 mm (2.24 in) |
| Shaft Diameter | 5.98 mm (0.24 in) |
| Body Length | 57.7 mm (2.27 in) |
| Overall Shaft Length | 92 mm (3.62 in) |
| Max Lipo Cell | 12s |
| Max Peak Current | 230A (2 seconds)2-second peak input. |
| Max Peak Power | 10200 Watts (2 seconds)2-second peak input. |
| Motor Timing | 5deg to 15 deg |
| Drive Frequency | 8kHz |
| Packaged weight | 780gIncluding packaging. |
| Installation and bearing maintenance | Leave sufficient pinion-to-main-gear clearance to avoid binding; apply a small drop of oil to each bearing every 5-6 flights.During motor installation and every 5-6 flights. |
| Bearing coverage limitation | Bearings and subsequent motor damage caused by bearing failure are excluded from warranty coverage; bearings require periodic maintenance and replacement.Bearing failure. |
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