You might try "Sky Battle". I downloaded it just this morning. Appears fun and challenging so far. Biggest challenge is that some of the aircaft choices are "locked" and I can't figure out how to unlock them, which makes me think it's really just a demo, but eveything I've found says it's a full game. Perhaps someone here can offer some advice. Sure would appreciate it! Thanks! Here's the link:
URL[
URL]Free Download Sky Battle 1.0 - Become a pilot in the WWI military conflict.
dean