Thrust angle with either electric or wet power has no set degrees, it is whatever is required, nothing more or less. I set up new planes with zero thrust then decide during the trim flights what is needed then go trial and error. I think 2.5 degrees of down thrust is as much as I have ever had in any plane. I did have a little scratch built Fokker D-VII that took a bunch of right thrust but still only had 2 degrees of down. Most of my stunt planes like Extras and Sukhois have zero engine thrust at all.