For detailed information see the IAC Calendar.
Beautiful, large aircraft perform a prescribed stunt pattern before a panel of judges. Flights are scored by smoothness and accuracy of maneuvers, with a bonus for aircraft appearance. There are no design restrictions, but most models typically use .35-.60-size engines, with wingspans reaching more than 5 feet. Precision Aerobatics is divided into skill classes for beginner, intermediate, advanced, and expert fliers. Two related events are Old-Time Stunt, using pre-1953 Stunt pattern and aircraft designs, and Classic Stunt, using aerobatics and aircraft designs that are more than 25 years old.