The Airbus A350 is a long-range, low-wing, twin-engine jet airliner, mainly of Franco-German production. The propulsion is provided by two Rolls-Royce Trent XWB engines. The prototype flight took place in 2013, and serial production began the same year and continues to this day. By August 2017, 107 copies of this aircraft had been produced, with Airbus having accumulated orders for 858 A350s by then. The Airbus A350 was created as a response to Airbus's concern about the new Boeing models: the 777 and especially the 787. The A350 was built from scratch, with new wings, new engines, a completely redesigned horizontal tail and completely new composite materials and production methods. It is estimated that all the research and development projects leading to the development of the A350 cost around 4 billion euros! The A350 aircraft is currently produced in two basic versions: the A350-900 (commercial premiere in 2014) and the A350-1000 (commercial premiere in 2017). The first has a larger fuselage capacity, but a shorter range - the second has a longer flight range, but a smaller capacity.