These models are replicas of full-scale aircraft. They are judged for workmanship, accuracy of detail, and other factors. They must fly and are scored on their ability to take off, land and perform other tasks. Precision Scale aircraft are the most detailed models and must be accompanied with airplane documentation showing the model's fidelity to the full-scale aircraft. Sport Scale requires less-precise detailing, and the aircraft are judged from a distance. Profile Scale is similar to Sport Scale, with the added provision that the models have profile (slab) fuselages. In Sport and Profile Scale, flying increases in importance.
Light rain quickly began to intensify shortly before the 8 a.m. pilot meeting, and it was apparent that flying was not an option, at least for the morning..