These are questions I'd like an answer to myself, did some minor testing in a Nav point by myself but it's very difficult to get any solid information solo.
NPCs don't seem to have any issue finding me an murdering me in the face when I try it but I suspect I'm getting too close, maybe. Really need testing in controlled circumstances to get any decent information about it.
As far as I can tell you can remain near invisible to sensors as long as you don't mind toggling engines on and off while you're attempting to get position on a target. Brumsters test suggests that engines on, silent running on, will make you an unresolved contact on the sensor panel until fairly close range. Don't know at precisely what range this becomes an issue though tbh. This should mean unlockable, gimbals and missiles ineffective.
As for escape and evasion, I'm usually panicking too much to try or at the very least, NPCs seem fairly unfazed by it once they are on your case.
Only one thing I can say with certainty, it's really difficult to kill players, they get all wiggly and jump out! Difficult to keep up and manage heat at the same time, Have exploded a lot trying, more likely to kill myself with heat than destroy an opponent. Seems pretty fair, the targets often exhibit some enthusiastic aerial(?) gymnastics and seem confused and panicky like they don't know what's happening or where they are getting shot from but I could just be projecting.
In summary;
Silent Running: ON | Engines: OFF
Sensor invisible and unlockable. Temperature is at equilibrium or falling.
Silent Running: ON | Engines: ON
Unresolved contact, still unlockable until fairly short range (undetermined) . Temperature rising.
Silent Running: OFF | Shields: OFF | Engines: OFF
Unresolved contact at long range only, lockable at medium to short range.
Turning off other subsystems seems to have only marginal effect.
Short Range: <1KM | Medium Range: 1-4KM | Long Range: >4KM
