Low performance light aircraft have very limited thrust and +GZ limits, so for such aircraft the TAS for max rate and min radius are the same.
With the limited thrust available I'm guessing the average lighty would be unable to make a sustained level turn at Va and pull max "g". Question, would the answer then be max power coupled with the max sustainable angle of bank?
Edited to add: Beagle and rapiddescent, we mere mortals are on a lower plane than you chaps and can only stand and lust after your machinery. What a Hornet and the like are capable of don't relate to the civil text books.