Propulsion machine comprising a sensing arrangement

Abstract

There is provided a propulsion machine comprising a fluid duct defined by a wall and a moveable member. The propulsion machine also comprises a mounting structure coupled to the moveable member, and an extendable structure having a sealing surface and a sensing arrangement. The extendable structure is moveable relative to the mounting structure to provide a seal between the sealing surface and an opposing surface of the wall. The sensing arrangement is configured to generate one or more signals indicative of a position of the extendable structure relative to the mounting structure.

Dependencies are inferred from the claim text.