I found it interesting that the Doctor started deleting rooms inside the TARDIS in order to free up the power needed to enter that pocket universe (or whatever you want to call where ever it is they went). This, on one hand, could imply that it takes constant power to maintain the interior configurations of the TARDIS. By this, I mean that the various rooms and their contents are not just materialized as solid, stable, static matter, but are more like projections such as a hologram or some kind of particle synthesis. The problem with this is that we have seen several occasions where the TARDIS has lost all power, and yet the control room and everything in it remained solid and unchanged. Also, if, as some of you were discussing, the individual bits and pieces of destroyed TARDIS's also retain their camouflaged states even after the rest of the ship has been destroyed, then that would be further proof that constant power is not required to maintain the ship's interior configuration. So this brings us back to the question of how then deleting rooms inside the TARDIS serves to increase power? Besides it doesn't seem like the power that it would take run the equivalent of (an albeit extremely advanced) "holodeck" or conversely that the relatively small amount of energy that would be gained by the total conversion of the matter making up a bunch of rooms and their contents would be more than the slightest drop in the bucket compared to overall energy output the TARDIS must clearly be able to generate in order to do even some of the less absurd things that we have seen it do. Perhaps Starsuperion's theory has a good deal of merit to it; that its not the physical rooms themselves that are the source of power consumption, but rather it is the generation of the artificial space that the rooms occupy that constantly consumes huge amounts of energy. So if you think of the interior space of the TARDIS like a bubble, then the smaller you make that bubble, the less power it consumes. But even this theory has its flaw, because what would prevent the bubble from collapsing completely wiping out everything, including the control room and everyone onboard, if the power were to fail?.
that is easy.. the bubble is still sustained by the copy of the eye of harmony..even if the power from the original on Gallifrey is no longer supporting the ship's copy, the copy itself is a massive complicated space time event (artificial singularity) and possesses massive gravitonic prowess able to maintain the interior dimensions much like the shriveled star core that sustains a black-hole. The difference is that space in that pocket dimension is folded back on itself, so no need for an event horizon or sucking down of the universe..and the copy of the eye is maintained in a sealed containment sphere approx 21km across..
From what I gather, the energy used by the ship from the rift powers the engines which are linked like a ship's propeller and rudder to the time vortex itself..and that same energy flows through the copy of the eye to sustain the reality, to increase it's size. when the ship's matrix, or computer mind creates new rooms, it takes shared power from the ship's engines, runs it through the copy of the eye, and forms energy into matter...that energy is siphoned from the engine output like extra gas for hauling a trailer behind a truck...
converting that matter into energy and fed into the vortex via the engines gives the ship a boost out of the tough area in which it is stuck.
Since, again, we have seen the power fail completely on several occasions, and (other then the lights going out) nothing catastrophic happened, we must assume one of two things...
1. There is something about the TARDIS's interior spatial construct that's designed to prevent a total collapse of the bubble in the event of a power failure (which I suppose is possible, but a bit of a stretch).
Or, perhaps more likely...
2. The bubble only requires energy when it is initially expanded and will then retain its dimensions unless it is deliberately shrunk; however, if it is shrunk, energy is then released which can be reabsorbed by the TARDIS and used for other things.
number 2 is definitely how I envision it works.. once the Dimension is built, and the matter within, it remains stable and constant, unless reformatted by the ship, which then again soaks up (rift) energy, and causes a strain on the systems.. maybe that is why the Tardis engines began to phase..because not enough rift energy was available to the engines via the copy of the eye of harmony, so running the power through the engines via a short hop to the moon and back would stabilise them and their molecular particles from atomizing and exploding..
It could simply be that he deletes the rooms to gain extra power. You know, from the whole matter-to-energy thing. Basically, he was having the TARDIS consume parts of itself.
The very point that I was trying to make was that the relatively small amount of power that would be gained from simply converting the matter in those rooms to energy would be utterly insignificant compared to the total power generation capacity of the TARDIS (as evidenced by the things we have seen the TARDIS do--even excluding the more ridiculous examples like it towing the entire Earth billions of light-years though subspace in just a matter of minutes, or it's destruction taking out the whole Universe). It would be like adding the equivalent of a 12v battery to the United States power grid--you wouldn't even notice it. This is why I assume there must be far greater forces at work here that would explain why deleting rooms from the interior of the TARDIS would result in such a significant increase of power.
that power is probably on an enormous scale, if you think about the type of energy used to create stable matter, and the amount of rift energy used to do so, it could be that those rooms deleted and converted into energy provide a momentary boost of energy.. not like a massive increase in speed, just a 3 second jolt or even just a mili-second jolt, which is enough to allow the Tardis engines to break it's constraints and become freed... on a normal scale it probably wouldn't amount to much output.. but then again, what if the output was just enough to disrupt what ever forces where there inhibiting the tardis in flight, while that interruption is in place, the ships engines are setting it free..
Isn't the TARDIS essentially infinite in size inside? 30% of an almost infinite amount of matter could probably produce a fair amount of energy. Or maybe the reduction in mass helps when exiting the universe?
The Doctor pretty much handwaved any explanation of how the TARDIS does it when he said it did it "With great difficulty"
What we have to understand is that once the matter is constructed, it must retain a fundamental amount of the type of energy used to create it.. I suspect much of the Tardis interior is saturated by Artron energy.. which is like pure mental thought energy.. which would explain why the ship can adjust itself and create new rooms at will, and how it can retain it's format in pieces left behind even after being consumed..
so it's not the functional aspect of the atomizer that must be present, if it looks like a bike handle, and it's particles of energy match the signature it needs to control that function, then it's the mother board of the ship's console itself that is the key, and the components are necessary but not in any particular design or material form, it works just by it's particular energy (DNA) signature if you will or particle to energy ratio..
I suspect that when a Tardis Reformats itself, it can grow, or remain the same mass.. but it can only remove that mass by deletion, which converts that material into raw energy, probably infused with Artron, which explains how the ship's power output is much greater..plus this explains why House ate the Tardises and left behind crumbs of the ships in broken pieces, as he fed off the arton energy within each component..
that also explains why Idris/Sexy had to touch the console and feed her own Artron power into the remnant Make-shift Tardis the Doctor had, cause most of the energy had been drained from the material.
