I know this is frightfully off-topic, but I've stumbled across news of a WW1 Flight Simulator being developed by a Russian Company. Just look at the screen-shots: they will blow your mind. Also: the ground models that are to be featured in the game are quite good: all the mjor tanks, etc.
Check it out at:
http://www.gennadich.com/id/69/
Notice that the attached image is a screen-shot from the game, not a splash-screen or a rendering.