Hydrogen vent nozzle

A vent nozzle for venting cryogenic gaseous hydrogen from an aircraft, comprising:

• a first section connected, via intermediary pipework, to a hydrogen tank,
• a second section, the second section projecting upwardly relative to the first section, and being downstream of the first section relative to the hydrogen tank, and
• a transitional section between the first section and the second section,
• wherein the vent nozzle terminates in a first outlet disposed on the second section,
• wherein a second outlet is disposed at least partially on a bottom surface of the transitional section and/or the first section, and
• wherein the vent nozzle comprises structure shaped to direct hydrogen towards the first outlet, and away from the second outlet.

A method of venting gaseous hydrogen from an aircraft, comprising:

• venting hydrogen through a first pipe, the first pipe directing the hydrogen along a first pathway,
• directing the hydrogen from the first pipe directly into a second pipe, the second pipe having a larger cross-sectional area than the first pipe at the boundary where the hydrogen passes from the first pipe into the second pipe, the longitudinal axis of the second pipe being angled to the longitudinal axis of the first pipe, the second pipe extending in an upwards direction, and
• releasing the hydrogen into the atmosphere via a hydrogen outlet, said outlet being disposed on the second pipe, such that,
• water which enters the second pipe through the hydrogen outlet passes out of the second pipe through a second outlet, said second outlet being a gap created between the first pipe and second pipe at the interface.