Hello Jan
This time, I especially apologize to you as this question was absolutely
unnecessary. What has happened is that I had not looked at the settings for the
gliders (I had never seen the gliders and their settings). There it is very
clear and very simple:
Settings -> Controls -> Glider airbrake -> assignment to desired keys
...
Now, I think this question comes: in FS
1, one of the gliders is a "engine-glider". Also here in FS 2 ?.
If so, (and assuming it is already operational), which of the gliders is
powered, and how is the engine activated?
Once again, thank you very much for your dedication, patience and agility in
the answers.
Kind regards: Delfin