Four categories of flying have been defined as follows:
Open – this category applies to all flying at VR/CS events that does not fall into either of the following three categories.
Concours – this premier category is for those models that best represents that spirit of imagination, experimentation and craftsmanship which characterized the early days of radio control aero-modeling. Planes must have been designed for RC. Winning Concours planes shall be retired from further competition.
Pattern – this category is for those planes, which are flown in the aerobatics or pattern competition. Planes must have been designed for RC.
Scale - this category is for planes that are exact or very near replicas of full size aircraft. Planes must have been designed for RC.