Aeralis gears up development of modular jet aircraft 30 April 2021 by Gareth Jennings UK-based Aeralis is preparing to take the next step in the design and development of a flying prototype of its modular jet aircraft, building on its contract earlier this year with the Royal Air Force (RAF) Rapid Capabilities Office (RCO). A conceptual image of the family of jet aircraft being developed by Aeralis. (Aeralis) Speaking to Janes on 30 April, CEO Tristan Crawford said that with this design and development taking place over three key stages, the company is preparing to launch the third and final stage ahead of the rollout and first flight of a physical aircraft.