Save for later Print Download Share LinkedIn Twitter The UK’s Royal Air Force (RAF) and industry partners say they have carried out a 100% sustainable fuel flight. The mission burned only sustainable aviation fuel (SAF) in both engines of an RAF Voyager — a military transporter variant of an Airbus A330. It is the first time that 100% SAF has been used in a military aircraft of its size anywhere in the world, and the first of any aircraft type in the UK. In a Nov. 19 statement, the RAF said the SAF made from used cooking oil was supplied by Air BP. The 90-minute flight from RAF Brize Norton over Oxfordshire was flown by a combined RAF, Rolls-Royce and Airbus flight test crew and replicated an air-to-air refueling sortie.