# Why Gravity in Jefferies Tube

Discussion in 'Trek Tech' started by Plutodawn, Mar 4, 2017.

Joined:
Jan 27, 2005
Or the plating on each deck contains, or possibly augments, the gravity from the plate below. It seems reasonable to me that apart from the lowermost decks, for example, the normal function of a single deck's plating is just to reinforce whatever gravity's been lost or dispersed from the floor below, shifting over to full gravity only if the deck below's lost gravity. Since the system is so reliable, except in damage-report chatter on the Original Series (where it's dropping to point-eight all the time), it's clearly technology that's got a lot supporting it.

Joined:
Aug 26, 2003
Hmm. At the very least, there's a sharp gradient on the exterior, so that spacewalks require special magnetic (gravitic?) boots in order not to become spacefloats.

How could we have local lack of gravity in the above scenario? When we get a single zero-gee room in "Melora", we can argue it's because Bashir turns on a special machine for creating the effect. But when we get a single zero-gee shower stall in "Unexpected", it must be a malfunction, "a little trouble with gravity plating on E Deck" to be specific. A malfunction that turns on a gravity-defying functionality sounds much less likely than one that turns off a gravity-sustaining one.

Timo Saloniemi

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Jul 14, 2004
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Huntsville, AL
My personal head-canon is that gravity plating requires both plating in the floor and a corresponding set in the ceiling, creating the gravity field between them. That would explain why there isn't any "gravity" outside the ship, it's because anyone walking on the hull is not between any sets of gravity plates.

Mytran likes this.

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Feb 21, 2005
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On the USS Sovereign
I think that inotial gravity plating might be like a capacitor with a field between the plates and little to none in the exterior. None of that for a tractor beam only an emitter.

5. ### Matthew RaymondFleet CaptainFleet Captain

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Oct 24, 2016
Gravity would make sense if Jeffery's Tubes were full height corridors. If you have corridors for accessing equipment that are just big enough for people to stand and turn around, it would be far easier to maintenance vital equipment and ship's systems. So perhaps the question we should be asking is: "Why have Jeffery's Tubes?"

Joined:
Aug 26, 2003
Or, more exactly, "Why do Jeffries tubes suddenly cease to be standing height in the middle of TNG?".

The TOS one was close enough to vertical to count as "standing height" in terms of both transit along it (it's a ladderway) and working in it (Scotty is more or less upright, his hands free for use). The original TNG tube was standing height as late as "The Hunted".

But naturally, the crawlways were "always" there aboard the E-D, in-universe. And conversely, the nicely full-height tubes were "always" there in the E-nil, as seen when ENT "In a Mirror Darkly" features a sister ship.

Timo Saloniemi

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Aug 5, 2009
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North Wales
A couple of awkward crawlspaces here and there I could understand - but there are whole NETWORKS of those darn TNG Jefferies Tubes, stretching off into the distance as far as the eye could see. And to make matters worse, the corridor set was designed with pop-off panels for the crew to access machinery with ease. Are miles of crawlways really a more efficient solution?

Joined:
Aug 26, 2003
Might be there's a robot to go with the tube dimensions, but a decree from on high bans its use from mid-TNG on because the poor thing just might be sentient enough to warrant civil rights yet refuses to sign a contract.

Why Cardassians would build similarly constrained accessways is another mystery. Possibly they want to establish a maximum size for slaves that escape via the tubes?

Timo Saloniemi

9. ### TommyR01DCaptainCaptain

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Oct 28, 2011
Location:
UK
It's shown that many personnel aren't particularly comfortable with zero-gravity ordeals.

Picking at panels in a crawlspace is bad enough without vomit floating around you.

Joined:
Mar 22, 2010
Sometimes you need to bear down to get a part loose anyway.

Working on asteroids, say--will probably require a cable over the top of a floating astronaut.

11. ### CRM-114CommanderRed Shirt

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Feb 8, 2014
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North Hills, CA
A better question that has a simple answer: On vessels that produce artificial gravity, why is it the only system that never fails, even on a derelict? Simple: the realities of TV production.