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How to Connect Two Electronic Speed Controls to One Receiver for a RC

Updated July 20, 2017

Electronic speed controls (ESC) are used to throttle an electric RC motor. ESCs do not work like variable resistors that change the amount of current running to the motor. ESCs always supply full current to the motor but do so in pulses. The more frequently the current is on, the faster the motor turns; reduce the frequency and you slow the motor down. Many ESCs contain a battery elimination circuit (BEC) that allows the modeler to use the same battery to power the motor and the servos. This BEC eliminates the need for a separate, on-board battery pack for the receiver and servos and reduces the model's overall weight.

Plug the "Y" cable into channel three on the receiver. Channel three is the throttle channel.

Plug each ESC into a leg of the "Y" cable. Connect each motor to the ESC that will control it. If each motor will be powered by its own battery, then you must disable the BEC function on one of the speed controllers. Check the speed controller owner manual for instructions on how to change this setting.

Install a standalone BEC device if your speed controllers do not have the feature. This is common on speed controllers that handle higher-amperage applications. The standalone BEC allows you to use one battery to power a motor and the receiver and servos; the other battery will be dedicated to the second motor.

Things You'll Need

  • Electronic speed controllers
  • Servo "Y" cable
  • Standalone battery elimination circuit device (optional)
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About the Author

Howard Altman is a transplanted New Yorker located in Centerton Arkansas. He has over 25 years of experience in the information technology field programming and supporting code. His hobbies include keeping a 1988 Ford F150 up and running and 30 years of Radio Control (cars boats and planes) experience. He has been writing how-to articles since 2008.