Fuel

According to the Thirteenth Doctor, positrons produced by the Tsuranga's particle accelerator interacted with the fuel materials to produce heat, which produced thrust. (TV: )
The Rocket ZA685 operated on a chemical fuel, of which there was barely enough for a return journey from Earth to the Moon, however the Moon continued to have fuel storage into the 2080s. (TV: )
The fuel rods in the Doctor's TARDIS were meant to be constantly submerged in fuel. If the fuel drained, the rods would cool and start to warp. (TV: )
When it was making its approach to Kyoto to drop the Big Momma atomic bomb, the Sky Jack was damaged and began losing fuel, making the plane unable to reach its target. (TV: )
Category:Energy and radiation