According to Reuters, the company used one of its own regional plane engines for the ground testing and the fuel of choice was green hydrogen obtained from tidal power and wind energy.

Rolls-Royce and company's partner easyJet now plan to conduct a second set of tests to prove that hydrogen can be a viable replacement for kerosene.

Hydrogen is one of the powering solutions that can help the aviation industry become net-zero by 2050, alongside with batteries and other green tech.

Implementing hydrogen on current planes would imply a modified chassis for safety reasons and also a change in airport infrastructure.

Rolls-Royce is also working on electric motors for airplanes, which will be most suitable at first for regional, short-distance air transport, but the company is also focusing on sustainable aviation fuel.