Hawker P.1121 Staff having been unable to understand the concept of the multi-purpose functionality of the aircraft, which would become commonplace on later aircraft. While seeking a new project to take the place of the P.1121, Camm soon began work upon another new and radical aircraft design, designated as the Hawker Siddeley P.1127. The P.1127 would become the Hawker Siddeley Harrier, the first effective vertical take-off and landing (VTOL) combat aircraft. The Hawker P.1121 was envisioned as being one of the first British-built supersonic fighter aircraft, being projected to be capable of speeds of up to Mach 2.5. It was to have
Hawker Aircraft 125, whose original design dated back to de Havilland days) under the "Hawker" name. This was the result of purchasing British Aerospace's product line in 1993. The name was also used by Hawker Beechcraft after Raytheon's business jet interests (Hawker and Beechcraft) were acquired by investors and merged. In the interwar years, Hawker produced a successful line of bombers and fighters for the Royal Air Force, the product of Sydney Camm (later Sir Sydney) and his team. These included the Hawker Hind and the Hawker Hart, which became the most produced UK aeroplane in the years before the Second World