do yourself a favor and ditch the flying circus as for single player it lacks in all departments. The A.I. aircraft are about the dumbest thing i've ever seen, they literally let you shoot them down. There is only scripted career mode or scripted campaign. At least on multiplayer ypu can fly against human opponents.
Wings over flanders fields is a beautiful recreation of fighting the First World War from the air. its a true singleplayer dynamic campaign. I think the graphics are amazing especially with the Over The Top DLC & The Last Hurrah. DLC #3 just hit Dawn Skies. The A.I. Aircraft are some of the toughest opponents ive seen yet in a flight sim. They dont hang around to let you pick them off. You enlist in The axis or allied air corps and try to stay alive at the front. Tommorow is not guarenteed. In Short I would play WOFF before i fire up FC.