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The Hobbywing Skywalker 20A is a brushless ESC for RC aeroplanes, FPV drones, UAVs, helicopters and DIY aerial robotics projects. It supports 2-3S LiPo batteries and has a built-in 5V BEC for a regulated supply.
The specification list gives a continuous current of 20A, a BEC output of 5V and a linear BEC type. The page describes fast throttle response, precise motor operation, a compact lightweight design and low heat generation. It showed low stock (3 left) at Rs 921 (SKU RS5181).
20A continuous current: for RC aircraft and drones.
Built-in 5V linear BEC: for receivers and servos.
2-3S LiPo: as listed.
Fast throttle response: and precise motor operation.
Compact and lightweight: as described.
Low heat generation: with efficient power management.
An electronic speed controller (ESC) converts the throttle signal from the flight controller into the three-phase power that a brushless motor needs. It switches battery current through MOSFETs at high speed, so the motor turns at the speed that the pilot or autopilot asks for. The continuous current rating shows how much current the ESC can carry all the time, and the burst rating shows what it can survive for a few seconds.
Match the ESC to the rest of the power system. The battery cell count must fall inside the listed range, the continuous current must be higher than what your motor and propeller draw at full throttle, and the signal protocol (for example PWM, Oneshot, Multishot or DShot) must be supported by your flight controller. An ESC marked OPTO has no built-in BEC, so the receiver and flight controller need power from another source. An ESC with a BEC can supply a regulated voltage, usually 5V, to small electronics.
Install and test carefully. Solder joints must be clean and strong, the motor wires should be kept short and tidy, and the ESC needs airflow because current makes heat. Calibrate the throttle range if the ESC needs it, check the motor direction with the propellers removed, and never connect a battery with the propellers fitted while you are working on the wiring. Use a battery with a cell count and connector that suit the ESC, and check for a heat problem after a short test hover.
RC airplanes
FPV drones
UAV projects
DIY robotics
Small helicopters
The BEC is linear, so keep the receiver and servo load light on a higher cell count.
The page gives no burst rating.
Type: brushless ESC
Continuous current: 20A
BEC output voltage: 5V
BEC type: linear
Battery: 2-3S LiPo
Use: RC hobby, DIY drone, model aircraft, brushless motor projects
1 x Hobbywing Skywalker 20A brushless ESC with 5V BEC
RC aircraft builders who need a 20A ESC with a 5V BEC.
20A continuous.
5V linear.
2-3S LiPo.
RC airplanes, FPV drones, UAVs and helicopters.
| Brand | Hobbywing |
|---|---|
| Battery Compatibility | 2-3S LiPo |
| Continuous Current | 20.000000 A |
| Selling unit | PCS |
