With Joystick2PPM4Arduino you control your R/C transmitter through the student input (PPM) with a DirectX capable Joystick or Gamepad.
In addition to this application you would need a notebook and an Arduino Uno to convert the Joystick movements into the PPM format. You would find the Arduino sketch needed on Github.
You would find a detailled description of the setup and the function with all respective links on www.makerprojekte.de.