In the last two Elites, ships have mass.
"Mass" in ED is just something that limits your jump range. But previously, it was proper
inertia.
Acceleration = force (thrust) divided by mass, and so because inertia is invariant (mass constancy), for a given thrust, acceleration is also constant (regardless of speed).
Acceleration can be angular or linear, but momentum scales linearly, following P=mV and angular inertia times angular velocity. Kinetic energy just adds the time derivative and subtracts the counter-momentum due to Newton's 3rd; KE = 1/2mV^2, equivalent to half angular velocity times angular inertia squared for rotation.
So for a given amount of mass and thrust, a given amount of acceleration takes a certain amount of time, and the more time passes, the more velocity and thus momentum and KE you have on that plane or axis.
So, for a given thrust, bigger, heavier ships take longer to accelerate on any plane or axis, and also have more momentum at a given velocity (because momentum is velocity times mass), and so, as you correctly point out, take equal time to decelerate.
You'll notice this when playing FFED3D - there's a kind of laggy feel to mouse and joystick inputs as craft get heavier - turn too fast and you'll end up having to correct.
But you still
can turn too fast, and this is far better than simply forcing you to turn slowly, preventing you overdoing it in the first place. Where's the skill or fun in that? What kind of spacepilot are you supposed to be?
And remember that velocity - like motion - is relative, not absolute. This is the same mistake FD made (apparently) - the reason we have a speed limit is because if two craft on separate clients accelerate together, side-by-side at equal rate, eventually they'll pass a threshold speed beyond which they start to jump around due to network lag, even though the actual velocity between them is a big fat zero. But FD are measuring velocity WRT coordinate space - as if the vacuum itself were a preferential reference frame, against which all other motions are relative. So this is why we have a network-imposed velocity cap.
As you can clearly see in previous ELites,
because velocity is actually relative, not absolute, you
do not need to come to a full stop WRT space itself in order to interact or fight with other ships etc. - you only have to close your relative velocity with your target destination, whatever that may be. This was always the case in previous Elites, and remains so in ED (what do you think an FSD is for?) - all planets and stations and USS's etc. have their own ambient velocities, they're not all stationary WRT space itself. So we simply match speeds with our destination, by whatever means, whereever we're going and whatever we're doing, like we normally do.
The fact that you were driving at 70 MPH on your way home is no barrier to sitting down at the dinner table, provided you remember to decelerate. Likewise, our planet's orbital or surface angular velocities can largely be disregarded when reaching for a cup of tea. When reverse parking, worrying about the fact that we're at superluminal speed WRT the redshift horizon is just gonna make you clip the curb. Need to change velocoties spontaneously? Et voila! - just select an appropriate reference frame. Could be anything, real or imagined.
Dealing with velocity IS spaceflight. I mean, it's surely one of the most enticing and evocative aspects?
Given that
we already have the FSD - which shifts you into any reference frame without physically accelerating, decelerating or moving anywhere, velocity need never be any barrier to interaction.
Not only is there no consistent rationale for a space speed limit, there's no fundamental need nor benefit for one. It's absolutely fundmanetally inimical to the very concept of space flight.
Speed limits
built into the ships themselves. So a slower ship is
voluntarily slower. Logically, if you have fuel and a working thruster, you could keep accelerating until either or both those conditions were no longer true. Then you could stimulate a complate halt, without actually decelerating, by simply taking your current velocity vector as your rest frame, or ejecting / spawning a virtual particle that continues on that vector and becomes your new frame, or just engage the FSD and come to an actual instantaneous full stop WRT anything anywhere.
I just cannot, for the life of me, fathom why a forum full of intrepid propsective space privateers would be so skittish at the prospect of controlling their own velocity the same way generations of gamers have before them have.. "love spaceflight, but scared of velocity"? I mean, fear of heights, vertigo, deep-vein thrombosis, even psychosis.. all these i'd understand.. but if you're nervous at the thought of unconstrained freedom, what is it about spaceflight that actually appeals - if it's just a glorified no-clipping mode, like space-engine but with more SFX? They just want the arcade buzz, right? It's not about spaceflight at all, it's about keeping the training wheels on a convenient context for spacey wallpaper..
It could be so much more..
Check out some of
these images - novel and outdated concept, but these ships got to those locations by
flying there!
They literally 'flew', through space, slicing through it as if it were nothing, not even very runny custard. It's way more fun that the supercruise minigame with its jarring lockups either side. And when it comes to combat, the exact same strapped-down handling this lot prefers can fully replicated, since it's only unreasistic in terms of how hopelessly nerfed it is, and with complete freedom, you can fly as nerfed as you like. You just don't
have to, all the time, everywhere..
I mean, just imagine the conversation with the mechanic as he's putting the finishing smudges on yer T6 - "so, hull's patched, ammo's topped up, the new motor just needs tuning - how slow you wanna go?" ... "..well, i'm doing a lot of long distance work at the mo, tight deadlines, so.. how slow can you make it?" .. "300 m/s?" ... "whoa, i wanna get there quick but i
wanna get there!" ... "..ookay, so 250 m/s?" .. "nah better play it safe, 200 should be fine. I only get to fly around 30 km of real space between supercuise sessions anyway" ... "fair enough, you're the boss"
Like turkeys voting for xmas..
The incredulity. That's it. Layers of it. Mine, at theirs. I am incredulous at aspiring space piratés incredulous towards spaceflight. "Free movement?
In space? You do what with the what what? I'm
so confused..".. but it's not their fault.. It's FD's. Oh, the opportunities they've missed..