The Queen of the Sky is a skyship created by Percival Bone in order to explore the Valley.
Quest for the Spark
In the spark books the Queen of the sky serves as the team's transportation, even Lorimar who lives in the wood of the ship.
The Queen of the Sky looks alot like a British ship only in the sky. It has two propellers on each side to steer the ship with three huge parade ballons under tarps attached to the ship. The Queen runs on a potato supply which in the first book was wasted to one crate left.