1. The Supersonic passenger plane Perhaps one of the most iconic passenger planes ever built, this plane was the result of British and French co-operation. It is of course Concorde, which could speed beyond Mach 2 – two times faster than the speed of sound. Scheduled flights began in 1976 but Concorde was officially retired in 2003. The fastest ever transatlantic Concorde flight was to London Heathrow from New York JFK airport and took just under 3 hours and took place in February 1996. Photo…