Re: TOS Enterprise - function of warp nacelles' caps?
Since the Enterprise
appears to travel in normal space at FTL speeds (rather than ducking into hyperspace), I've seen multiple suggestions
that the ship uses an Alcubierre drive
Note that the glittering domes on the front of the warp engines are offset by domes at the rear (later in the series). North pole/south pole of the warp field?
The artificial black hole and "white hole" of the drive would dovetail with the engine effectiveness against fluctuating gravity fields ("Naked Time").
"No, I better not look. I just might be in there."
—Foghorn Leghorn, Little Boy Boo