The test will try to identify practical alternatives to the current industry-standard fuel kerosene, with the potential of making planes "greener".

The two companies will initiate a joint tender process, inviting suppliers to offer alternative fuel samples for testing on a Rolls-Royce RB211 engine from a British Airways Boeing 747.

The tests will be carried out on an indoor engine test bed at the Rolls-Royce facility in Derby.

Testing the engine in the controlled environment of a Rolls-Royce test bed allows more accurate data to be gathered than would be possible on an actual flight because additional instrumentation can be used and performance and emissions will not be affected by other external factors.

Following the tender process, there will be a selection of up to four alternative fuels, which will undergo laboratory testing before being delivered to Rolls-Royce in the new year. Each company will be asked to supply up to 60,000 litres of their alternative fuel.

This will be followed by intensive trials, during which the aero-engine will be powered by the alternative fuels and its performance compared to running on conventional kerosene.

In each case, the engine will be operated through its full range of power settings including idle, acceleration, take-off and cruise.

Testing is expected to be complete by the end of next March, after which the results will be analysed and reported.
Ric Parker, director of research and technology at Rolls-Royce, said: "The key criteria for the selection of the alternative fuels will be their suitability, sustainability and industrial capability. It is critical that the fuel can not only do the job required of it, but can also offer a CO2 benefit and be produced without a detrimental impact to food, land or water."

Jonathon Counsell, BA’s head of environment, said: "We are delighted to be leading this study with Rolls-Royce. BA was the first airline to set fuel efficiency targets, leading us to improve our fuel efficiency by 28% since 1990."