Lateral balance cone
From Tardis Wiki, the free Doctor Who reference
Lateral balance cones were components of a Type 40 TARDIS.
The Fifth Doctor speculated that an attempt to get Tegan Jovanka back to Heathrow Airport in 1981 was unsuccessful because of a "temperamental solenoid" in the TARDIS's lateral balance cones, causing it to land in the right place, but three centuries too early. (TV: The Visitation)
When the lateral balance cones went offline on another trip, the Fifth Doctor landed in 2008 Hove instead of 1818 Brighton. (AUDIO: Cuddlesome)
Adric denied being responsible for reprogramming the helmic regulator, particularly as the lateral balance cones were already "out of alignment". (AUDIO: The Toy)
