- 19-seat Dornier 228 twin-engine aircraft takes to the sky in testbed configuration for first flight as part of the HyFlyer II project.
- Milestone moves ZeroAvia forward on the way to meeting target of commercial flights using only hydrogen fuel cell power by 2025, and scaling the engine technology to larger airframes.
- Marks a significant step in addressing aviation’s climate change impact and a major innovation success for the UK Government’s Jet Zero Strategy.
The twin-engine aircraft was retrofitted to incorporate ZeroAvia’s hydrogen-electric engine on its left wing, which then operated alongside a single Honeywell TPE-331 stock engine on the right. In this testing configuration, the hydrogen-electric powertrain comprises two fuel cell stacks, with lithium-ion battery packs providing peak power support during take-off and adding additional redundancy for safe testing. In this testbed configuration, hydrogen tanks and fuel cell power generation systems were housed inside the cabin. In a commercial configuration, external storage would be used and the seats restored.
All systems performed as expected. This is the largest ZeroAvia engine tested to date, and places the company on the direct path to a certifiable configuration to be finalized and submitted for certification in 2023, with this programme also serving as key to unlocking speedy technology development for larger aircraft. ZeroAvia’s 2-5 MW powertrain programme, already underway, will scale the clean engine technology for up to 90-seat aircraft, with further expansion into narrowbody aircraft demonstrators over the next decade.
Of note, this flight test campaign is being conducted under a full Part 21 flight permit with the UK CAA, which is a much more stringent set of requirements compared to the E-Conditions framework ZeroAvia used for its 6-seat prototype test flights in the prior years. This signifies the maturity of the company’s processes and design approaches and its readiness to proceed towards full commercial certification of its powerplants.
ZeroAvia will now work towards its certifiable configuration in order to deliver commercial routes using the technology by 2025. The Dornier 228 will conduct a series of test flights from Kemble and later demonstration flights from other airports. Almost exactly two years ago, ZeroAvia conducted the first of more than 30 flights of a six-seat Piper Malibu aircraft using a 250kW hydrogen-electric powertrain.
Author: Bryan Groenendaa
About the HyFlyer II Project
The HyFlyer II project will see ZeroAvia develop a certifiable hydrogen-electric powertrain that can power airframes carrying up to 19 passengers. To do this, it will collaborate with two partners, the European Marine Energy Centre and Aeristech. The HyFlyer II project will conclude with another world’s first hydrogen-electric flight by ZeroAvia in a 19-seat aircraft, with a 300 nautical mile flight in 2023. The HyFlyer II project is part-funded by the UK Government’s Aerospace Technology Institute’s (ATI) programme, supported by the Department for Business, Energy and Industrial Strategy and Innovate UK.
