Hinges is a must in making your control surfaces working properly. There are many ways of making a hinges on a scratchbuild model aircraft. It is depend on the build material you are using for your build and how strong you want your hinges to hold.
For a basic scratchbuild using compress foam/ foam board, the easiest way is to make a tape hinge. Here i'm going to show you the basic of making a tape hinge for your model aircraft.