Anhedral stab--As it applies to aerobatics --
put the model into a hard skid -then hold it there -
each of the flying surfaces - wings stabs -fin etc-- is now approaching the air at an angle which may/ may not , add a lifting- or increased pressure .
That type flying is simply not part of full scale practice --but in an aerobatic model - --here is what it can do -
the stab half which is yawed forward --now has a totally different AOA -and can add down pressure
The stab half on the trailing side , is blanked -in some cases -by the fuselage .
The net gain --was to have the down pressure exerted by the entire horizontal stabilizer, remain constant -even if yawing the model , killed the air flow on the trailing stab half.
OK- any comments as to why this idea is flawed?
Please-- no formulas -