Fun Fly rules vary from event to event... they are class C competitions. (no AMA rulebook defined tasks or aircraft specifications)
You can have a Fun Fly that specifies all .40 size ARF trainers if you want. You can have one that says nothing over 22 inch wingspan... or one that says nothing uner 90 inch span.... Its up to the organizers of the event. The event can limit engine size (or not) It can have just about any wierd rule you can think of...
So... You need to talk to the event CD.
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BTW... the only references I find to a "Corvin Miller" event.... are the Scale Masters qualifier. Thats definitely not a Fun Fly.... (Well any flying is fun

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http://www.sarasotarc.com
See comming events.
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