Abstract: A composite cylinder for an actuator. The cylinder includes a radially inner fibre-reinforced polymer layer defining a hollow bore, a radially outer fibre-reinforced polymer layer, a primary conductive coil, and a first and second secondary conductive coil wound between the radially inner fibre-reinforced polymer layer and the radially outer fibre-reinforced polymer layer. The first secondary conductive coil extends axially along at least a first region of the cylinder and the second secondary conductive coil extends axially along at least a second region of the cylinder, and wherein the primary conductive coil extends axially along at least a central region of the cylinder between the first region and the second region.

Abstract: A locking mechanism for a hold open rod. The hold open rod includes a first elongate member and a second elongate member, slidably arranged to move between a first configuration and a second configuration, the second configuration being extended relative to the first configuration. The mechanism includes a locking mechanism operable between a locked state and an unlocked state and arranged, in the locked state, to prevent the first and second elongate members from returning to the first configuration. The first elongate member includes a first surface. The locking mechanism includes a locking member moveable between a first position and a second position. The locking member includes a second surface.

Abstract: A composite cylinder for an actuator. The cylinder includes: a radially inner fibre-reinforced polymer layer defining a hollow bore; a radially outer fibre-reinforced polymer layer; a primary conductive coil, and a first and second secondary conductive coil wound between the radially inner fibre-reinforced polymer layer and the radially outer fibre-reinforced polymer layer. The first secondary conductive coil extends axially along at least a first region of the cylinder and the second secondary conductive coil extends axially along at least a second region of the cylinder, and wherein the primary conductive coil extends axially along at least a central region of the cylinder between the first region and the second region.