Time rotor

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Time Rotor with blown glass core as currently appears in the TARDIS of the Eleventh Doctor

The Time Rotor was a component in the central column of the TARDIS console. When the TARDIS was travelling the rotor roes up and down until it has reached a destination. It was associated with the 'whooshing' noise heard when the TARDIS was in flight.

The aesthetic design, along with the rest of the TARDIS, had periodically changed throughout the Doctor's travels. The Time Rotor was considered to be connected to the lower engines; hence as the TARDIS moved the rotor moved accordingly. Its up-down motion may have been significant to the way the engines worked. As well as signifying the TARDIS' movement, the rotor was also known to malfunction or stop working when something goes wrong e.g. the rotor stops moving as the TARDIS engines are stalled, rectified by the Doctor bumping the console (Doctor Who).

The rotor, as it had varied through designs, had alternated between being a single column or a series of components that moved into each other from above and below. An example of the multiple columns would be in the Ninth Doctor's TARDIS and the Eighth Doctor's also. The TARDIS of the Eleventh Doctor it was a single component, much like in the earlier versions.

The console in the TARDIS' secondary control room was strangely lacking in a Time Rotor for some reason. (DW: The Masque of Mandragora)

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The Eighth Doctor gazing at the Time Rotor.

Behind the scenes

• It is interesting to note that in the non-canon Dalek movie spin-offs, Doctor Who and the Daleks and Daleks - Invasion Earth 2150 AD, the Tardis lacked the time rotor or even a central console.