Aircraft

A double-deck 72.2m (237ft)-span swept wing passenger jet with two aft mounted Rolls-Royce Trent-like engines and an altitude ceiling of 55,000ft (16,700m) has been proposed as a more environmentally friendly airliner by a group of former UK aerospace engineers, calling their project Stratos.

Cruising at 47,000ft at a speed of 505kt (934km/h), the 63.4m-long Stratos would have a 19,300km (10,400nm) range with 256-passengers in an all-sleeper configuration and is envisaged to be in service from 2028.

© Roger Hulks