Here's some Hornet and afterburner shots from Kevin Caccamo's Landreich-themed mod of WC Saga, Hostile Frontier. The engine exhaust color was tweaked to look more "realistic." I'm not too sure that the proper color of a futuristic ion drives can be determined exactly, but the orange flame certainly stands out distinctly in space. He's also been working an optional upgrade that attempts to give the engine a more intertial feel similar to classic Wing Commander games.
Lastly, I've been experimenting with the game engine to try and reproduce the good old inertia/newtonian physics of WC1/2/Prophecy/Secret Ops. The results aren't quite satisfactory, but it does work to a certain extent; it's good for combat, but not so good for carrier takeoffs and landings.
I'll release this physics mod as a separate download from the main WCHF package to give players a choice and a bit of a deviation.