HY4 — Air Liquide liquid-hydrogen tank

Supplier

Air Liquide Advanced Technologies

Aircraft program

HY4

Category

Hydrogen storage and delivery

Product

Liquid-hydrogen tank for the HEAVEN HY4 demonstrator

Role and scope

Cryogenic tank designer and supplier for HEAVEN demonstrator integration.

Relationship status

Demonstrator collaboration

Program stage

Demonstrator

Evidence status

Company-reported

Limitations

Research integration does not establish a production system or certified aircraft.

Source

Source publication date

Last checked

October 27, 2026