MTU just began manufacturing its 600 kW hydrogen aircraft engine

Signals Inbox·July 28, 2026·Next-Gen Aviation

MTU has moved its hydrogen aircraft engine from drawings into hardware. The original 600 kW manufacturing milestone came in 2025, but the bigger signal now is that MTU is building integrated demonstrators, scaling the architecture toward 1.8 MW, and preparing a commercial engine company with Airbus.

Q1What actually happened?

According to MTU Aero Engines, it completed the design of its first 600 kW Flying Fuel Cell powertrain and started producing fuel-cell stacks for a demonstrator in June 2025. The electric motor was also tested, and MTU began moving from design into manufacturing and assembly.

Q2Why does 600 kW matter?

Because this is aircraft-scale power, not a tiny lab cell. MTU plans to use the system on a Dornier 228 test aircraft by replacing one of its two conventional engines. The 600 kW motor weighs about 40 kilograms, reaches 15 kW per kilogram, and runs at more than 96 percent efficiency.

Q3Is MTU ahead of everyone?

Not by itself. ZeroAvia has already flight-tested hydrogen-electric systems and is developing its own 600 kW-class ZA600 for aircraft with up to 19 seats. MTU has a different advantage: it is a major certified engine supplier, and its technology is now being industrialized with Airbus rather than developed only as a startup demonstrator.

Q4What has changed since manufacturing began?

The project has moved beyond the original 600 kW headline. In July 2026, MTU said it was building a close-to-production 350 kW fuel-cell stack and a full-system demonstrator for integrated tests. It has also finalized a 1.8 MW research design meant to prove the architecture can scale to between 2 and 4 MW.

Q5Why is Airbus now involved?

Airbus and MTU plan to create a joint venture in 2027 that would handle development, testing, certification, production, sales, and support. That matters because the bottleneck is no longer just making a fuel cell work. It is turning one into a certifiable engine that airlines can actually buy and maintain.

Q6So is hydrogen flight close?

Closer technically, but still far commercially. MTU targets regional aircraft from around 2035, while hydrogen storage, airport supply, certification, weight, and cost remain hard problems. The real signal is not that zero-emission airliners arrive tomorrow. It is that Europe is building the hardware, company structure, and certification path needed to make them possible.