Product overview
The Scorpion HK5-5530-255kv 8x40 shaft is a helicopter propulsion motor in Scorpion’s fifth-generation HK series. Its primary application is an 850mm–950mm+ UAV helicopter operating on 12s–14s power. The named configuration has an external shaft measuring 7.98mm × 40mm, and the motor weighs 847.0g (29.87oz). Its physical architecture combines a 55mm-diameter, 30mm-thick stator with 12 stator arms and 10 stator poles. The winding specification is 7+8T D, with motor wire specified as 2 × 1.08mm.
The cooling arrangement pairs an internal fan with an external centrifugal fan to increase airflow through the motor. The motor has a 255KV RPM/Volt specification and a continuous power rating of 5200 Watts. Continuous current is 100 Amps under the industrial rating; the alternative hobby rating is approximately 150A. Peak current of 180A and peak power of 9500 Watts each carry a two-second limit. These duration limits distinguish the short peak capability from the continuous operating ratings.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HK5-5530-255kv 8x40 shaft |
| Intended application | 850mm - 950mm+ UAV helicopter applicationDesigned primarily for 12s -14s operation. |
| Cooling architecture | Internal fan combined with an external centrifugal fan; nearly doubled airflow through the motor. |
| Motor Kv | 255KV RPM/Volt |
| Weight | 847.0g Grams (29.87oz) |
| Motor Body Dimensions | 67.9mm x 68.0m (2.67" x 2.68 ") |
| External Shaft Dimensions | 7.98mm x 40mm (0.314" x 1.57") |
| Continuous Current | 100 Amps*Industrial continuous-current rating. |
| Continuous Power | 5200 Watts |
| Peak Current | 180A (2 seconds)2 seconds. |
| Peak Power | 9500w Watts (2 seconds)2 seconds. |
| Max Lipo Cell* | 12s - 14s |
| Stator Diameter | 55 mm ( 2.16 in) |
| Stator Thickness | 30 mm ( 1.18 in) |
| No. of Stator Arms | 12 |
| No. of Stator Poles | 10 |
| Motor Wind | 7+8T D |
| Motor Wire | 2 x 1.08mm |
| Approximate hobby continuous-current rating | Around 150A continuous currentHobby rating. |
| Packaged weight | 866gIncluding packaging. |
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