Sorry you're wrong! Space craft don't fly!! They are projectiles. They DO NOT have "Normal flight" as you say. They follow parabolic trajectories and are entirely dependant on the thrust input which only increases the angle of the trajectory which in space and here on Earth is influence by gravity. THEY DO NOT FLY!!!!!!!!!!!!!!!!!
Vololiberista
EXACTELY like a normal plane in atmosphere, excepted that this projectile receives some drag from the gaz.
I'm talking about the physics point of view, or the "flight model" if you prefer.
Space flight is exactly like atmosphere flight, but the forces induced by the surrounding gaz are then inexistent, and have to be replaced by engines thrust.
That means that you don't need a spacesim to do space flight.
A flight sim that does not simulated space flight is incomplete. A Spacesim that does not simulate atmosphere flight is incomplete. We already had a discussion about that on another topic.