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
First-generation jet fighter led by Kurt Tank and was based on initial designs for the Focke-Wulf Ta 183, the proposed successor to the Me 262. The Pulqui II itself was a successor to the I.Ae. 27 Pulqui I, a prototype jet fighter developed in Argentina by Emile Dewoitine in the late 1940s and the first of its type to fly in South America. By the 1950s, the next major group of fighter aircraft were planes that used air-to-air missiles as their primary armament and could routinely exceed the speed of sound in level flight. First-generation fighters were limited to engagements in visual range,