As part of its ongoing decarbonisation strategy Rolls-Royce is to use 100% sustainable aviation fuel (SAF) for the first time in engine ground tests on next-generation engine technology.

The tests will aim to confirm that unblended SAF makes a significant contribution to improving the environmental performance of gas turbine engines.

The SAF being used in the tests was produced by low-carbon fuel specialist World Energy in Paramount, California, sourced by Shell Aviation and delivered by SkyNRG. This unblended fuel has the potential to significantly reduce net CO2 lifecycle emissions by more than 75% compared to conventional jet fuel, with the possibility of further reductions in years to come.

These tests aim to demonstrate that Rolls-Royce’s current engines can operate with 100% SAF as a full “drop-in” option, laying the groundwork for moving such fuels towards certification. At present, SAF is certified for blends of up to 50% with conventional jet fuel and can be used on all current engines.

Starting in the coming weeks in Derby (UK), the ground tests will involve a Trent engine which also incorporates ALECSys (Advanced Low Emissions Combustion System) lean-burn technology.

ALECSys is part of the UltraFan® next generation engine demonstrator programme, which offers a 25% fuel saving over the first generation of Trent engines.

www.rolls-royce.com/media/our-stories/insights/2018/alecsys-lean-burn-combustor.aspx