I just did a search for 'What is IMAC' and didn't come up with any immediate results. In the Pattern forum there is a 'What is Pattern' sticky which I found to be very useful.

Why is there none here? I have an idea what IMAC is, but I bet there's a lot I don't know. I know I can go to an IMAC official website, but I think, as informative as RCUniverse has been, there should be something specific here.

So what is IMAC? Aerobatic routines for scale planes? That's the extent that I know. Does it include any 3D (personally I'm not into 3D)? What are competitions like? What is the camaraderie like?