Product overview
The CKESC SKY 6S 40A from Nanchang Changkong Technology Co., Ltd. is an electronic speed controller for model-aircraft propulsion. Its lightweight construction combines industrial-grade hardware with adaptive operating parameters. The controller weighs 24.9g including wiring, and its dimensions are listed as 55*18.5*9mmmm. Integration requires a 2~6S supply and a throttle signal within the 1000~2000us travel range. It accepts refresh rates of 50~500Hz, with 100~400Hz recommended. The configuration has no BEC, and standby consumption is 21mA at 25V.
The 40A continuous-current rating requires good heat dissipation. Low-voltage protection is disabled by default but can be enabled through customization. Other protection functions inhibit startup under excessive supply voltage, limit unsuccessful starting current, retry stalled motors, and restrict peak current or excessive motor load. Above 125°C, maximum output power gradually falls, potentially to 40% of full-throttle power, and recovers as temperature falls. Signal loss triggers a staged reduction to shutdown. Stall recovery has a material limitation: a stall at high throttle may damage the controller.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Nanchang Changkong Technology Co., Ltd. — CKESC SKY 6S 40A electronic speed controller for model aircraft. |
| Rated specification | 40A, 2~6S. |
| Design | Lightweight design with industrial-grade hardware and adaptive operating parameters. |
| Dimensions | 55*18.5*9mmmm |
| Weight | 24.9g.Including wiring. |
| Continuous operating current | 40A.With good heat dissipation. |
| Supply voltage | 2~6S. |
| Throttle refresh rate | 50~500Hz; recommended 100~400Hz. |
| BEC | None. |
| Standby consumption | 21mA.At 25V. |
| Throttle travel range | 1000~2000us. |
| Low-voltage protection | Disabled by default; can be enabled through customization.Default configuration; activation can be customized. |
| High-voltage protection | Prevents the motor from starting.Supply voltage exceeds the permitted value. |
| Startup protection | Limits starting current and automatically retries startup.An unsuccessful motor start. |
| Stall protection | Attempts to restart the motor after a stall, generally caused by external force.A motor stall during normal operation; a stall at high throttle may damage the ESC. |
| Overtemperature protection | Gradually reduces maximum output power, potentially down to 40% of full-throttle power.Temperature exceeds 125°C; original power is restored after the temperature falls. |
| Overcurrent protection | Limits peak current so that it does not exceed the limit. |
| Overload protection | Limits maximum throttle to protect the propulsion system.An excessive motor load is detected. |
| Signal-loss protection | Begins reducing output power, rapidly reduces throttle below 50% within 1~2 seconds, then slowly reduces throttle until the motor stops.Control signal has been lost for 200ms. |
