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The HobbyWing SkyWalker 40A is a brushless motor driver for remote-controlled hobby aircraft and drones. The page describes a smooth and linear throttle response and a compact, lightweight design.
The specification list gives 40A continuous current, 55A burst (over 10 s), a 5V 3A BEC, a battery range of 2-3S LiPo or 5-9 NiMH cells and a maximum speed of 210,000 RPM (2 poles), 70,000 RPM (6 poles) and 35,000 RPM (12 poles). The page showed low stock (3 left) at Rs 1,219 (SKU RS467).
40A continuous, 55A burst: burst is over 10 seconds.
5V 3A BEC: for receiver and servos.
2-3S LiPo or 5-9 cell NiMH: as listed.
PWM, Oneshot125, Oneshot42, Multishot and DShot: input signals.
Programmable: by card or transmitter.
Multiple protections: low voltage, overheat, signal loss and stall.
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
Drones
2-3S power systems
Programmable setups
Aircraft with servos
The ESC can be programmed by card or transmitter, including braking, soft or hard low-voltage cut-off and timing. It has a safety lockout if the throttle is not at the bottom at start-up.
Protections listed are low voltage cut-off, overheat, throttle signal loss and motor stall.
Continuous current: 40A
Burst current (over 10 s): 55A
BEC: 5V 3A
Battery: 2-3S LiPo / 5-9 cells NiMH
Max speed: 210,000 RPM (2 poles), 70,000 RPM (6 poles), 35,000 RPM (12 poles)
Signals: PWM, Oneshot125, Oneshot42, Multishot, DShot
Protection: low voltage cut-off, overheat, throttle signal loss, motor stall
1 x HobbyWing SkyWalker 40A ESC
RC aircraft and drone builders who need a 40A ESC with a 5V 3A BEC.
40A continuous and 55A burst.
2-3S LiPo or 5-9 NiMH cells.
5V at 3A.
PWM, Oneshot125, Oneshot42, Multishot and DShot.
| Brand | Hobbywing |
|---|---|
| Battery Compatibility | 2-3S LiPo / 5-9 cell NiMH |
| BEC Output | 5V/3A |
| Burst Current | 55.000000 A |
| Continuous Current | 40.000000 A |
| Supported Protocols | PWM, Oneshot125, Oneshot42, Multishot, DShot |
| Selling unit | PCS |
