ZeroAvia_first_flight 930 (Credit ZeroAvia)

HyFlyer projects

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Project: HyFlyer II

Project Overview: 

The HyFlyer II project will see ZeroAvia develop the first certifiable hydrogen-electric powertrain that can power airframes carrying up to 19 passengers.  This builds on developments in the first HyFlyer project which saw the world’s first flight of a commercial-grade hydrogen-electric aircraft at Cranfield in September, utilising a smaller version of ZeroAvia’s hydrogen fuel cell powertrain in a 6-seat Piper Malibu M350. The project aims to conclude with a world-first hydrogen-electric flight this time in a Dornier 228 testbed aircraft with a 350 mile flight.

EMEC will deliver the green hydrogen fuelling systems required to power the aircraft for flight tests, including its mobile fuelling platform designed to suit an airport environment. Aeristech, a leading developer of power dense and efficient air compressor solutions, will work with ZeroAvia to integrate its advanced air compressor system as part of the new 19-seat powertrain.

Project Partners:

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  • The Department for Business, Energy and Industrial Strategy (BEIS)
  • Aerospace Technology Institute
  • Innovate UK

Funding: £12.3 million

Dornier 228 first flight test

Dornier 228 High speed taxi testing

Ground testing of Dornier 228


Project news:


Project: HyFlyer I

Project Overview:

The HyFlyer project aims to decarbonise medium range small passenger aircraft by demonstrating powertrain technology to replace conventional piston engines in propeller aircraft. The conventional powertrain in the aircraft will be replaced with electric motors, hydrogen fuel cells and gas storage.

HyFlyer will demonstrate a phased approach from battery power to hydrogen power, integrating the new technology aboard a Piper M-class six-seater aircraft. The aircraft will perform initial test flights out of Cranfield and culminate in a 250 – 300 nautical mile (NM) A – B demonstration flight.

The project is led by Zeroavia, developers of hydrogen fuel cell powertrain solutions. Project partners Intelligent Energy will optimise its high power fuel cell technology for application in aviation whilst EMEC Hydrogen, producers of green hydrogen from renewable energy, will supply the hydrogen required for flight tests and develop a mobile refuelling platform compatible with the plane.

Project objectives:

  • Deliver world’s first fuel cell powertrain for zero-emission aviation
  • Prove technology, repowering existing airframes for sub 500 NM aircraft
  • Prove aviation maintenance and operations for technology
  • Stimulate and the aviation market and service offering for the entrance of this technology

The HyFlyer project is supported by the ATI Programme, a joint Government and industry investment to maintain and grow the UK’s competitive position in civil aerospace design and manufacture. The programme, delivered through a partnership between the Aerospace Technology Institute (ATI), Department for Business, Energy & Industrial Strategy (BEIS) and Innovate UK, addresses technology, capability and supply chain challenges.

Project partners:

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HyFlyer funder logos slide 640

Project news:

Flight footage:


EMEC Hydrogen Webinar | Decarbonising Lifeline Services in Orkney using Hydrogen

ZeroAvia Virtual Summit | Path to Clean Aviation in a New World







Aquamarine Power


Atlantis Resources Corporation



Naval Group

Naval Group


Open Hydro


Orbital Marine




ScottishPower Renewables



Sustainable Marine Energy

Sustainable Marine Energy


Voith Hydro


Wello Oy

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