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In 1947 Derry joined de Havilland as a test pilot, working largely on the de Havilland DH 108 aircraft. He is widely believed to have exceeded the speed of sound on 6 September 1948, when he lost control of his aircraft and the Mach meter supposedly 'briefly showed' supersonic speeds in a shallow dive from 12,195 m (40,000 ft) to 9,145 m ...
On 6 September 1952, a prototype de Havilland DH.110 jet fighter crashed during an aerial display at the Farnborough Airshow in Hampshire, England. The jet disintegrated mid-air during an aerobatic manoeuvre, causing the death of pilot John Derry and onboard flight test observer Anthony Richards.
Then, on 6 September 1948, John Derry is thought to have probably exceeded the speed of sound in a shallow dive from 40,000 ft (12,195 m) to 30,000 ft (9,145 m). The test pilot Captain Eric "Winkle" Brown, who escaped a crash in 1949, described the DH 108 as "a killer". [9]
Following a demonstration of its ability to break the sound barrier during a low level flight, the aircraft disintegrated and debris landed in the midst of spectators killing 31 people, including the crew of two, the test pilot John Derry and his flight-test observer, Tony Richards. [9] [10]
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All major pieces of the American Airlines plane and Black Hawk helicopter that collided last week in Washington, DC, have been recovered, the National Transportation Safety Board announced Saturday.
John Derry, another de Havilland test pilot, has been called "Britain's first supersonic pilot", because of a dive he made on 6 September 1948 in a DH 108. [11] Contrary to what is depicted in the film, the first aircraft to break the sound barrier was the rocket-powered Bell X-1 flown by Chuck Yeager of the United States Air Force in 1947.
John’s parents Julia and Alfred Lennon first met when they were teenagers and married in secret a decade later in 1938. John was born in 1940 but his parents didn’t raise him – Julia allowed ...