RE: Difference between IMAC and Pattern
A couple more differences......
IMAC.....
takeoff and landing are not scored
You fly 2 sequences each flight
You have unknown sequences (they are sequences handed out after day 1.....you are not allowed to fly them, or practice on a sim. You can use a stick plane to help visualize the sequence.
Unknowns are not thrown out.
Known sequences change every year
This is where the Tuscon Aerobatic shootout (TAS) is held
IMAC has the Nats also
Pattern.....
takeoff and landing is scored
there are no unknowns
sequences change every few years
Pattern pinnacle is the Nats and Worlds
I fly both also.