Theory is fun to read -but in application -on this small stuff I truly believe that max performance -in this case - the tightest turn with least speed loss possible, boils down quickly -
First second and third - is wing loading.
The theory here is that tiny wings simply slip/fall/ slide thru the air-the air never gets a chance to to compress under the foil-so little or no pressure difference
The only way to get the lightest loading -is to build the lightest shape, capable of doing the job-
So here we have two basic approachs at work:
!- turning smallest radius as possible whilst not stalling-OR-
2 turning radious as fast as possible without loosing momentum.
Now ask yourself - how can one execute the turn (180 turn) -in less TIME-loosing less SPEED, if induced drag increases?
Maybe- vectored thrust might really produce the best results.
What if one greatly increased the AOA of the prop disc to assist in the turn?
One might couple the "elevator?" to change wing to fuselage relationship-for the turn .
By the way
I do not have a degree in engineering.
So keep your answers as simple as possible -for me.