Heaven FCH

HEAVEN main goal is to design, develop and integrate the worldwide first aircraft powertrain based on high power density fuel cell system and high energy density liquid hydrogen fuel system into an existing 2-4 seats aircraft for testing in flight operation.

About project

Cryogenic liquid hydrogen storage technology will be applied to aeronautical applications for the first time worldwide. This technology improves the current energy density of pressurized H2 tanks by a factor of 2 to 5, and leads to commercially viable performances.

A pressurized fuel cell system is demonstrated to increase the power density of the system by a factor of 2 to 3 and can operate at higher temperature, leading to fewer cooling efforts needed and thus a reduction of weight, power consumption and volume of the thermal management system.

Protocols based on safety analysis, redundancy of the powertrain, auxiliary systems, tests and simulations with the final goal of a flight demonstration will provide reliability figures in support of future certification.

News and Events

NEWSLETTER 08 – September 2023

Oct 17, 2023

CONTENTS 01. Partners' progress concerning HEAVEN (April 2023 – September 2023) ....................................................... 2 02. HEAVEN Flights and press event in Maribor, Slovenia...

HEAVEN project completes world’s first piloted flight of liquid hydrogen powered electric aircraft

Sep 11, 2023

The hydrogen-electric ‘HY4’ demonstrator aircraft took off from Maribor, Slovenia, and saw safe and efficient operation throughout multiple flight tests The aircraft uses liquid hydrogen to power a hydrogen-electric fuel cell system that powered the aircraft for the...

Sustainable aviation at Paris Airshow

Jul 12, 2023

As part of a new Memorandum of Understanding, signed at the Paris Airshow, Air Liquide will strengthen its relationship with H2FLY, by providing its expertise on liquid hydrogen for onboard and on-ground infrastructure. Air Liquide is currently working on several...