After reading the thread three times, I still can't figure what the controversy is about...
that there has to be a reduction in AoA with the deployment of flaps... That means the nose goes down, it simply has to...
For the posted graph, that's what's going to happen. If the graph for a different plane's flaps looks different, that's not what might happen.
If anyones flight model isn't doing this.... then what conclusion can we only come too ?
That either there's a mistake somewhere, or that flaps for that plane act differently to the posted graph.
This plane is on final approach....
It's YaSim though.... but yes, flaps are deployed to nearly full, sinkrate might be too high though at this point, it's not on a 3-deg glideslope, it was my first landing after not flying the Twin Otter for quite a while, so this was not a textbook approach.