Hawker Siddeley P.1127 Hawker Siddeley P.1127 The Hawker P.1127 and the Hawker Siddeley Kestrel FGA.1 are the experimental and development aircraft that led to the Hawker Siddeley Harrier, the first "vertical and/or short take-off and landing" (V/STOL) jet fighter-bomber. P.1127 development began in 1957, taking advantage of the Bristol Engine Company's choice to invest in the creation of the Pegasus vectored-thrust engine. Testing began in July 1960 and by the end of the year the aircraft had achieved both vertical take-off and horizontal flight. The test program also explored the possibility of use upon aircraft carriers, landing on in 1963. The first three
Claims to the first powered flight a steam-powered aeroplane which took off from a ramp with a sailor on board and remained airborne for a short distance. This has sometimes been claimed as the first powered flight in history but the claim is generally rejected because takeoff was gravity-assisted and flight was not sustained. It is however credited as the first powered take-off in history. Ten years later in 1884 the Russian Alexander Mozhaysky achieved similar success, launching his craft from a ramp and remaining airborne for 30 m (98 ft). The claim that this was a sustained flight has not been taken seriously outside Russia.