Only bombers are allowed an outside view (F3) in the air. It simulates having a bunch of guys looking all around. Fighters had only what the one guy in the cockpit could see.
Lusche, is that a setting that could be changed in a custom arena?
As usual the mosquito is the exception. It has more that one crew, but you cant switch to the 2nd crew position like you can with gunners, you cannot move the pilot head position inside the cockpit to look outside over his seat, and you dont get F3 view.
The mosquito VI navigator does not contribute anything except his lbs weight. He may be replaced by a sack of potatoes and no one will notice - performance wise. He is invaluable though because his tenor complements my bariton very well when we sing duets on route.