A fuel system (200) for a hydrogen fuelled aircraft propulsion system (103) comprises a tank (104) configured to store hydrogen, a first inductor (436a-c) provided within the tank (104) and configured to heat hydrogen fuel within the tank (104), and a seco...

A hydraulic damping apparatus 2 comprising a conduit 4 for a hydraulic fluid having a port 12 in a wall of the conduit 4; a resonator 6 having a chamber 9 and a neck 10, the neck 10 being arranged to provide fluid communication between the chamber 9 and th...