This article is an extension of the YouTube video, here you’ll find some more information to understand your project better and finish it, including a explanation video that shows you how to connect and set up the electronics.
Main project video
More about the DIY RC airplane
 You are in the article right now, down below you’ll find the video that explains everything else about connections and radio set up, you’ll need to register for free to access the video.
 Decalage angle or angle of incidence is the angle between the main wing and horizontal stabilizer and also the mean datum line of the fuselage, the maximum angle between the wing and the H. stabilizer in this DIY plane should not exceed 5º https://en.wikipedia.org/wiki/Decalage
 The center of gravity is explained in detail in this video https://youtu.be/URglaHEt5Pk
 The control surfaces https://youtu.be/XxrdhJanotw
If you’re using the Flysky radio then this is the perfect video to finish and understand your project, if you’re using any other brand don’t worry because the menu and set up process is similar in all computer radios.