Any model with moving parts can be remote controlled with the aid of a few easily installed additions. Using a combination of remote control receiver and transmitter, remote servos and push/pull rods, you can precisely control your model through a wide range of movements. Building model remote controls can be done using the same connection process with any model type, whether you’re controlling an RC airplane, car or robot. The only difference is in the range of movements desired and the placement of the controls.
Attach a control horn to the control surface, the part to which you need to apply movement. A control horn is a small plastic fixture with a hole in it. Glue the control horn to your moving part using epoxy glue so that the horn when pushed or pulled will move the part in the direction you want it to move.
Install the remote receiver inside your model in an easily accessible area. Connect the servo cord to the receiver so that the receiver can send commands to your remote servo.
Adjust the range of movement of the servo by removing the servo arm from the servo and adjusting its placement angle. Remove the push/pull rod from the arm and then unscrew the servo arm before pulling the arm directly off the servo. Place the arm back onto the servo at a different angle and then reattach the push/pullrod. Changing the arm placement changes where the moving part sits at rest. For example, if the unadjusted servo position has the control surface flat, by moving the arm away from the control surface, the surface will be tilted slightly upwards at the start. By moving the arm closer to the control surface, the surface will be tilted downwards.