Definitely forward = down, backwards = up. Just like the nose does when you pitch the craft. It's more intuitive IMO. But if you want more work, implement some kind of "invert-x-axis-when-gliding" system or something like that... might be more worky.
Limited fuel would definitely add realism and challenge, but it's not a priority, as most folks would probably use unlimited fuel option anyways... the direction indicator would be more important. I think it would be easiest to do that by meddling with motion debris. Make them have a colour and a trail and that's it. More sophisticated system would involve having the modified motion debris only visible when gliding, for example.
And of course, it would be good to know one's backward velocity, vertical velocity (left/right) and horizontal velocity (up/down) as well as forward velocity.
And for the future: implementation of aerodynamics for atmospheric missions, thank you very much.
It shouldn't be too difficult, btw... We already have thrust, inertia and direction controls - what would be needed to upgrade the model to simple aerodynamic model is angular momentum (do we have that already?), lift and drag forces - and constant gravitational acceleration.
We don't need or even want absolutely physically accurate model, so it would suffice to have the drag and lift as invisible thrusters (or force vectors) that have variable strength.
Drag is almost directly derived from craft velocity and angle of attack and drag coefficient... AOA 0 gives the smallest drag, while negative or positive AOA's increase the drag. Drag is always pointing in the other way from air speed vector.
Lift is derived from air speed, angle of attack, and lift coefficient - it's easier to just assign a suitable value for ships rather than start counting values based on ships mass and lift area, air density and such...
If we want even more sophisticated system, it's possible to implement rough aerodynamic stability model by implementing more force vectors representing aerodynamic forces affecting different parts of the ship, like possible control surfaces and whatnot.
But first things first...By the way - is Beyond the Red Line team going to implement retro-rocket thrusters for their spacecraft? Or in other words, a visible vector control system - or are they keeping the craft Freespaceishly miraculously self-turning?
