One of my game design ideas is for a grand tactical WW1 air warfare game..combat along the lines of a Wings of War tabletop game but using a physics engine if anyone had played DarkWind then something like that Car Combat but in the air and a z axis, another great point about that system is that the actual pilot skill will really count on how well the plane performs over how good you are at choosing the right move for them. I'd then have a large RPG element managing squadrons (even just concentrate on one Squadron) deal with moral issues, replacements, Corps Orders, awards, burials, Visits by Trenchard or the kaiser, assign aircraft, manage ground crew, send out laison to the Infantry, choose who to be a front line observer, see squadron Doctors reports to keep an eye out on your pilots and their mind state, arrange leave, move airfields manage airfield condition esp if after a bomb raid you'd have to get the repair teams out which could then mean that one of the plane sin the next flight was serviced good enough and has a higher risk of developing a fault etc etc.