2013 Rule Change: Comparing Radii

Good news, judging just got easier!

In years past, radii drawn as sharp angles were sometimes expected to be equal to one another, and other times not. And the same applied to radii drawn as curves. In the heat of an aerobatic contest, it could be very difficult remember these rules. Now this whole topic has been greatly simplified:

  • "Sharp" radii need not be equal to one another, except for Family 3 figures and hesitation loops (square loop, diamond loop, and octagon.)
  • All "curved" radii must be equal to one another, except for Family 8.8 "double humpties."

That's it!! For a full description of this change, see the IAC Rule Book, Section 8.4.3 (login required.)