A Chinese research team has unveiled an aerodynamic model for a massive flying-wing passenger aircraft that could carry more than 800 people, marking a bold new entry in the country’s large aircraft programme. Unlike conventional aircraft that have separate fuselage, wings and tail, a flying wing merges most of the structure into a single broad lifting body. The proposed design is 85 metres (280 feet) wide and 43 metres long, with a wingspan roughly 1.6 times that of the B-2 Spirit stealth...