How about this one?
Screenie from Over Flanders Field.
A mod for CFS3. I know, CFS3 is the poor cousin of most other current flight sims, right? Not any more. The work done by thses guys is incredible. It utilises an exterior wrapper to completely rework the game giving you one of the best campaigns i've flown in a flight sim. Beautiful graphics being the tip of the iceberg. Phase 1 is out just now with plane sets from 17 and 18. Phase 2 will hopefully be out before X-mas with planes sets and campaigns running from the start of the war through to the end. On top of that, the front line will move as it did in real life, there will be an even greater selection of mission types, gun jams and all sorts of little bunus treats....
I have to say. I've had more fun playing this mod than many of the sims I've paid full price for. I even bought cfs3 just for this. Best five quid I've spent in years.
Try it and see if you can live as long as 17 hours flying time.