Well, IMHO there's only two big ones worth delving into - OFF and RoF, which is a really good thing, as they are complimentary of each other.
RoF is sort of like Apollo 13; the machine is the thing, and the story is always in context of the maths going on. The men are there to get the spacecraft home.
OFF is The Right Stuff, given to the stories of the men that made it happen. The machines are there to get the men into space.
An imperfect analogy, of course; the machines in RoF work as expected.
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More dumb stuff at
http://www.darts-page.comFrom Laser:
"The forum is the place where combat (real time) flight simulator fans come to play turn based strategy combat."