I am having similar problems but it doesn't seem to relate to the trim wheel. Nearly every time I fly the S.E.5a, I get shot in the head and killed! I always get shot down, even by Albatros D.IIs. I can fly the SPAD XIII no worries. The Nieuport 17 I like best and I can fly the Albatros D.Va without difficulty. But as soon as I get into the S.E., I'm dead.
I'd be happy if I could survive even one mission.