Product overview
The Scorpion HKII-4525-520KV – ULTIMATE (6mm 55mm) is a brushless drive motor intended for 700-class RC helicopters. Its physical construction combines CNC-machined aluminum alloy parts with a gold electro-coated finish, epoxy-coated stators and 0.2mm stator laminations. The winding uses a single strand of 1.4 mm wire rated at 180 degrees C (356 F). For installation planning, the motor weighs 516 Grams (18.20oz), measures 56.9 mm across its outside diameter and has a 57.7 mm body length. Shaft diameter is 5.98 mm, with an overall shaft length of 112 mm.
The supplied package contains one motor, three 6mm female bullet connectors with heat shrink, and an M4 bolt hardware pack. Electrical integration limits include a maximum 12s LiPo configuration, 100 Amps continuous current and 4450 Watts continuous input power. Peak inputs of 230A and 10200 Watts are limited to 2 seconds. Motor timing is 5deg to 15 deg, with an 8kHz drive frequency. Installation requires sufficient pinion-to-main-gear clearance to prevent binding, while bearing upkeep calls for a small drop of oil on each bearing every 5-6 flights and periodic replacement.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HKII-4525-520KV – ULTIMATE (6mm 55mm) |
| Intended application | Brushless motor for 700-class RC helicopters. |
| 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 | 112 mm (4.41 in) |
| Max Lipo Cell | 12sLiPo battery configuration. |
| Max Peak Current | 230A (2 seconds)2-second peak duration. |
| Max Peak Power | 10200 Watts (2 seconds)2-second peak input duration. |
| Motor Timing | 5deg to 15 deg |
| Drive Frequency | 8kHz |
| Housing construction | CNC-machined aluminum alloy parts with a gold electro-coated finish. |
| Stator construction and wire temperature rating | 0.2mm stator laminations, epoxy-coated stators, and winding wire rated at 180 degrees C (356 F).180 degrees C (356 F) is the winding-wire rating. |
| Supplied configuration | 1 x Scorpion HKII-4525-520kv BLDC motor; 3 x 6mm female bullet connectors with heat shrink; 1 x hardware pack containing M4 bolts.Included equipment. |
| Packaged weight | 780gIncluding packaging. |
| Installation and bearing maintenance | Leave sufficient clearance between the pinion and main gear to avoid binding. Oil each bearing with a small drop every 5-6 flights; bearings require periodic maintenance and replacement.During motor installation and every 5-6 flights. |
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