Trying to resolve the "indoor" problem with airfoil studies is pretty much a waste of time
The setups which actually work, are first off, minimum weight (wing loading)
next they must be capable of flying at EXTREME angles of attack with no floundering.
The VAPOR is still the best commercial example of what can be done and with some time spent flying one at all speeds - the parameters needed become obvious-unless one chooses to believe the same effeciency requirements for large aircraft apply.
They don't-
If you are serious about this - watch some of the video coverage of indoor precision aerobatics . There are plenty of examples on UTube etc..