International Aerobatic Club (IAC) One Design for FS6 Version 2.0 The IAC one design was conceived and designed as a single category competition aerobatic monoplane, much like the Formula 1 class in air racing. The FS6 version is intended to reproduce the mission of the real airplane; crisp, fun, VFR sport aerobatics. Mitch Robbins robbinm@chi.ntsb.gov