In search for the correct profile of the THS
to this post of mm43 (which turned out in vain) i stumbled on the following graphic:
positive and negative AOA
It depicts the point zero AOA Lift (there is lift due to the cambered profile) and max CL at 16 AOA (stalling AOA of that profile) in the positive AOA region and in the negative AOA region. In the negative AOA region the max CL is smaller by the amount of zero AOA CL.
When we transfer this information to the THS we must assume, that max AOA for max CL is the same for THS up (AND) or THS down (ANU), that the max CL for AND is smaller than max CL for ANU due to the cambered profile for ANU. The ANU function of the THS is more effective than the AND function.