I presume that you are playing offline...
Dont use "veteran" or "ace" skill for bomber pilots flying ability, or they act like a "Red Baron"...
And, improve gunners skill to at least "veteran" to see what they can do.
Instead use, ie "veteran" skill for plane, go to advanced and set skill individually for pilot, gunners, bombardier...
If you plan test your own skill at rear gunner, set pilot skill as "rookie", so the AI pilot dont try "dancing" Hula Hula.
Sokol1