For the Citation Sovereign.
"The engine tailpipes are angled out 4 deg. to reduce asymmetric thrust and minimum control speed. This results in lower contaminated-runway takeoff field lengths, especially a low takeoff weights."
I thought angled inward would be do this but I guess outward is what works.
You're thinking of wing mounted engines. With tail mounted engines, the thrust vector of the operating engine will be behind the CG. (I did the same thing)