RE: Micro Motors
09 is considered class A.
That's why you used a Cox 049 in 1/2A freeflight and then removed it and put on an 051 and flew the same plane in ClassA freeflight. Holland hornet made 049/051 and so did Atwood for this very reason. Also fly an 051 in 1/2A speed and if they find out you get disqulified.