The size of the aircraft is defined as the largest linear dimension, that is, the largest distance between any two points located on the model while it is airborne.
Controllable flight is to be determined by judges.
Making circles around the field would satisfy this requirement. Most competitors use a video transmitter and camera to accomplish this mission. Since this is an international competition, its participants will be given flying priority. Item 1 simulates a video transmitter. There are no restrictions on the placement of the dummy video transmitter and video battery pack.