DS9 lost gravity and so did Klingon warbirds but yes, never a federation ship.
I’m gonna go with “the gravity generators have sufficient residual force that it takes days for the gravity to noticeably dissipate due to…*spins wheel*…neutrionic buildup in the…mass-simulation coils.”
@ehurtley
The NX-01 lost gravity for one opening scene.
..which is not a Federation ship, so I suppose your point stands.
@TechConnectify
It's definitely one of those timey-wimey things. Depending on the needs of the plot, it's either shipwide or each deck has its own gravity generator. The only constant is that the handwavium includes controlled emission of gravitons.
If the artificial gravity is shipwide, a falling turbolift plot element at least sort of makes sense; otherwise it's one of them there plot holes.
Each turbolift car (probably) has its own graviton emitter arrays to allow it to travel through the turbolift shafts/conduits.
The thing that gets me though is that there's not a single turbocharger to be found in the entire system.
@DopeGhoti @TechConnectify Gravity generator somewhat implies a point source for the force applied, which would be… like trying to live on an Alderson disc. It'd be problematic.
Building it into a planar surface such as the deck plating itself, with a single direction of pull (projected up… meaning pulling down) makes the greatest sense, for such a fictional technology.
The trick is, of course, continuous power drain. Because apparently gravitational manipulation ain't no thang; like inertia.
@DopeGhoti @TechConnectify This means the turbolifts themselves would be within a zero-gravity environment (optimally), with gravity only projected within the volume of the inhabited space.
(I may or may not play a sci-fi author on the television in my head.)
@alice
Oh inertia is definitely a thing, that's why in a catastrophic incident the first things to tip over, in order usually, are:
Fun semi-related fact- in the TNG-era sickbay sets that had the big screen with the readings for all sorts of biometrics for the patient on the diagnostic bed? One of them - and always the first to bottom out - was labeled "Medical insurance remaining".
@djfiander
Oh, and like *your* civilization never lost a technological safeguard.
@TechConnectify It... works. That's about it.
Some ships have an area where gravity changes across a void space.
At least some older Klingon ships can lose artificial gravity, but given the ease of walking around wrecks, it appears the Federation system is passive? But it's clearly not simply a huge mass doing it, or they'd absolutely wreck planetary orbits on every first contact
I think that's about everything that's in canon about how it works.

The Heisenberg compensator was a component of the transporter system. The compensator worked around the problems caused by the Heisenberg Uncertainty Principle, allowing the transporter sensors to compensate for their inability to determine both the position and momentum of the target particles to the same degree of accuracy. This ensured the matter stream remained coherent during transport, and no data was lost. A scan of the Heisenberg compensators, to ensure they were performing within...
@TechConnectify Of course turbolifts don't fall.
There is more risks of the turbolift heat pump failing and the occupants freezing to death.
@TechConnectify The bigger curiosity is the "inertial dampening" fields that mean accelerations and turns of thousands of G appear onboard as a mild inconvenience - certainly not large enough to require seatbelts.
I would assume the "artificial gravity" is really just a minor hardwired directional exception to the dampening field, such that instead of nullifying ALL the Gs, it allows through a gentle downwards waft of a mere 1.0 G.
@TechConnectify IIRC the turbolifts need to have inertial dampeners built in, because to get anywhere on a ship the size of Enterprise in remotely the time shown, they have to exert 10s of Gs on their occupants during normal operation, which would not be healthy for them.
So since the lifts themselves have very strong inertial damping field generators, having them "fall" would be bizarre.
How do any of these things work? As Okuda famously said: "They work just fine, thank you."
@TechConnectify on a DS-9 episode, Sisko builds a solar sail ship and mentions making an exception to historical accuracy by installing “gravity plates in the floor” because floating in zero-g is inconvenient.
So +1G gravity is embedded in the flooring of ships somehow.
As for turbolifts my understanding always was that they don’t fall as much as accelerates out of control across the shafts which from the occupants perspective might feel like a falling elevator if it’s accelerating “downward”.
@TechConnectify Here's this entire geeky thread reverse engineering a few convenient bits of magic tech to make spaceship shows shootable in the 60s, and I love it.
Meanwhile, in Star Wars, when the Mandalorian does a loop de loop, Baby Yoda falls *upwards* towards the canopy.
Figure THAT one out, nerds.
@TechConnectify On the scale of silly things in Star Trek, that's like a 2.
Try this one: in the Next Gen series, any hologram left on long enough (Vic from DS9, Doctor from Voyager) becomes a sentient, living, being... and everybody just kind of shrugs and goes about their business not considering that weird at all or doing anything to prevent it