Folks,
Re. Ms. Schilling, those SU carbs should never have been on any aircraft engine, they were bad enough on auto(im)mobiles.
Bendix pressure carbs., from the good old USA were the answer. Of course, the Germans had fuel injection and all attitude/G oil systems, as well.
When you know of all the problems of the early Merlins, it makes the achievements of 1940 even more amazing.
Re. upset training see the new FAA and EASA rules on the subject.
Tootle pip!!
PS: I have done a lot of spins over the years, I have never had an engine quit due fuel starvation in a spin.