The National Championship Air Races will run from September 16 – 20, 2015. Aircraft qualification periods are scheduled for September 14 – 16, 2015. In general, the National Championship Air Races begin daily at 8 a.m. with Biplane and Formula One Class races with the remaining four classes and aerobatic performances and demonstrations following later in the day. Unlimited Class races usually occur during the afternoon with the last event of the day ending at approximately 4:30 p.m. Schedule subject to change.