[4] In 2019, the company completed flight tests of the electrical aspects of the initial powertrain design, where it was later reported that an external hydrogen tank was fitted to a Piper Matrix.

[7] In December 2020, the company was awarded £12.3 million, from the UK Government's ATI Programme, to develop a 19-seat hydrogen powered aircraft with a 350-mile (560 km) flight to be completed by 2023.

No one was seriously hurt in the accident, but the aircraft received substantial damage, losing its left wing, after it was forced to land following a power system test.

The HyperTruck tests systems for 40-80 seat hydrogen-electric powered aircraft and is sized to ZeroAvia’s ZA-2000 2 MW (2,700 hp)+ powertrain.

[15] That same year, Textron Aviation and ZeroAvia partnered for the development of a hydrogen-electric powertrain for the Cessna Grand Caravan.

[16] On 19 January 2023, ZeroAvia flew its Dornier 228 testbed for 10 minutes with one TPE331 turboprop replaced by a prototype hydrogen-electric powertrain in the cabin, consisting of two fuel cells and a lithium-ion battery for peak power.

Airbus will also collaborate with ZeroAvia on approaches to certification and technical aspects such as fuelling operations and fuel-cell testing.

Verne claimed that CcH2 can significantly lower densification costs and refueling times versus liquid hydrogen, while increasing storage duration and potentially eliminating pressure management (venting).