- February 1, 2021, 12:19 PM Following successful 100 percent SAF validation tests using one of its commercial Trent 1000 engines, Rolls-Royce demonstrated the ability of its latest business aviation powerplant, the Pearl 700, to run on the unblended sustainable fuel. (Photo: Rolls-Royce) Rolls-Royce has successfully conducted its first tests on a business jet engine using 100 percent sustainable aviation fuel (SAF), it announced February 1. The demonstration, conducted at the manufacturer’s facility in Dahlewitz, Germany, comes on the heels of a similar test using a Trent 1000 engine in the UK. This latest experiment used a Pearl 700 engine that's under development for the new Gulfstream G700 and confirmed that the company’s current commercial and business jet powerplants “can operate with 100 percent SAF as a full 'drop-in' option, laying the groundwork for moving this type of fuel towards certification.”