Walkera 4G3 V3 brushless tail motor conversion and setup review

Walkera 4G3 V3 Brushless Tail Motor Upgrade Set

The Walkera 4G3 flies well with the brushed tail motor, but I have found it a bit under powered .The brushed motor just can't keep up with extra torque generated with fast throttle changes. That's why I decided to upgrade my Walkera 4G3 with the brushless tail motor.

The Walkera 4G3 V3 Brushless Tail Motor Set comes with all the accessories needed for the upgrade. Included in the set are the brushless tail motor, motor mount, speed controller, vertical fin, motor lead, y-lead and some screws. Installing the brushless tail motor is easy, and will take about 30 minutes.

First you have to remove the brushed tail motor. Simply unclip the rear PIT servo from the servo mount to gain access to the brushed tail motor wire lead that runs inside the tail boom. Cut the two brushed motor wires and remove the motor and motor mount. Unplug the tail motor power lead connector from the receiver and pull the lead from the tail boom.

Now the Walkera 4G3 is ready for installing the brushless motor set. Take the tail motor power lead and press it through the tail boom so that the lead exits at the end of the tail boom. Install the vertical fin and brushless tail motor to the motor mount. Secure the tail motor mount to the tail boom with the supplied screw. Use a soldering iron to connect the power lead to the brushless motor. Don't forget to use the supplied heat shrink tubing to prevent any short circuits during flight.

There is no specific order to connect the power lead wires with the brushless tail motor. If the direction of the tail motor is incorrect, simply turn the power lead connector plug around and reconnect it to the speed controller. Clip the rear PIT servo back into position. Connect the white signal lead of the brushless tail motor speed controller to the TAIL MOT SIG plug on the receiver.

Use the supplied double sided tape to stick the speed controller to the receiver. Connect the speed controller motor power connector with the motor lead that runs through the tail boom. The final step is to connect both speed controllers to the Y-Lead. Below is an electrical layout diagram that will help you with the installation.

Receiver

Test the direction of the brushless tail motor. If the direction is incorrect, swap the tail motor power lead connector around. That will change the direction of the tail motor. I found that the extra weight of the speed controller makes the Walkera 4G3 a bit nose heavy, but a bit of up elevator trims sorts that out.

Conclusion