Sail
From Tardis Wiki, the free Doctor Who reference
A sail was part of a boat which could catch the wind, propelling the vessel. (PROSE: The Shape on the Chair)
Sails also existed in some spacecraft. An escape shuttle from the Crucible of Souls had three sails to catch time winds. They were all ripped off in the Time Vortex, taking parts out of the outer shell. (AUDIO: Ship in a Bottle)
