Product overview
The Scorpion HK5-4020-1205kv is a brushless motor intended primarily for helicopters using 520–550mm blades and a 6s LiPo battery, with other applications extending to its stated power capability. Its physical architecture combines a 40mm-diameter, 20mm-thick stator with 12 stator arms, 10 stator poles and a 3T + 4T Delta winding. An internal fan works with an external centrifugal fan to move cooling air through the motor; this arrangement is described as nearly doubling airflow.
Installation space must accommodate a 49.5mm x 52.00mm motor body and a 5.98mm x 32mm external shaft. Motor weight is 325.6g (11.48oz). Continuous ratings are 105 Amps and 2450 Watts, while 150A and 3330 Watts are limited to two seconds. The stated 6s cell count can be exceeded with appropriate gear ratio adjustment. The supplied package contains one motor, three female 4mm connectors, three heat-shrink pieces and a hardware/accessory pack, with a packaged weight of 400g.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HK5-4020-1205kv |
| Intended application | Primarily for helicopters with 520 - 550mm blades running on 6s LiPo, or other applications requiring up to 3330w.520 - 550mm blade size helicopter running on 6s lipo. |
| Cooling architecture | Internal fan combined with an external centrifugal fan; airflow through the motor is described as nearly doubled. |
| Motor Kv | 1205KV RPM/Volt |
| Weight | 325.6g Grams (11.48oz) |
| Motor body dimensions | 49.5mm x 52.00mm (1.95" x 2.05") |
| External shaft dimensions | 5.98mm x 32mm (0.235" x 1.26") |
| Continuous current | 105 AmpsContinuous operation. |
| Continuous power | 2450 WattsContinuous operation. |
| Peak current | 150A (2 seconds)2 seconds. |
| Peak power | 3330 Watts (2 seconds)2 seconds. |
| Maximum LiPo cell count | 6sHigher cell count possible with appropriate gear ratio adjustment. |
| Higher cell count provision | Higher cell count possible with appropriate gear ratio adjustment.Appropriate gear ratio adjustment. |
| Stator diameter | 40 mm (1.57 in) |
| Stator thickness | 20 mm (0.79 in) |
| Number of stator arms | 12 |
| Number of stator poles | 10 |
| Motor winding | 3T + 4T Delta |
| Motor wire | 1.68mm |
| Supplied configuration | 1 x HK5-4020 BLDC motor; 3 x female 4mm connectors; 3 x heat shrink; 1 x hardware / accessory pack.Included in the box. |
| Packaged weight | 400gIncluding packaging. |
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