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  • Midair collisions to metal fatigue: tragedies that changed air travel | Business

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See the news Midair collisions to metal fatigue: tragedies that changed air travel | Business from Source New York Times on 17/03/2019 has been updated to day with the theme on feedixo.

Midair collisions to metal fatigue: tragedies that changed air travel | Business

The history of aircraft development is marked by technological breakthroughs – from more fuel-efficient engines to the use of carbon-fibre materials – that have spurred the creation of better, safer aircraft. However, fatal accidents have also forced design changes that have improved subsequent aircraft and prevented further loss of life. Here are some examples.BOAC flight 78110 January 1954A De Havilland Comet operated by British Overseas Airways Corporation crashed after suffering a catastrophic decompression in mid-flight. The Comet fell into the sea near Elba, off the Italian coast: all 35 people on board died.It was the second in a series of three Comet accidents in less than a year, all from similar causes. Investigators found that structural cracking had started in the roof of the cabin: a window had become detached and struck control structures at the back of the aircraft, and the rear fuselage had then torn away.The cause was metal fatigue, arising from the constant pressurisation and depressurisation of the aircraft’s fuselage during everyday use. Also, supports around the windows had been riveted, not glued, in a process which is thought to have caused cracks.The fuselage was also experiencing considerably higher stresses than had been anticipated, particularly around the sharp corners of the Comet’s square windows. As a result, future jetliners would feature windows with rounded corners.Delta Air Lines flight 1912 August 1985The Lockheed TriStar operated by US carrier Delta encountered a thunderstorm while approaching Dallas-Fort Worth to land. The aircraft struck the ground far short of the runway and disintegrated, killing 137 people and injuring 28 others. Investigators found that the crash had resulted from the flight crew’s decision to fly through a thunderstorm; the lack of procedures or training to cope with “microbursts” (small but intense downdraughts that occur in storms); and the lack of advance warning on the sharp changes in wind speed or direction known as wind shear.After the investigation, an onboard weather radar was developed by Nasa. The resultant airborne detection and alert system was installed on many airliners after the US regulator insisted all commercial aircraft must have onboard means of detecting wind shear.FacebookTwitterPinterest The De Havilland Comet suffered three fatal crashes in 12 months in the 1950s, leading to an advance in the understanding of metal fatigue. Photograph: JA Hampton/Getty Images British Airtours flight 28M22 August 1985A Boeing 737 caught fire before takeoff at Manchester airport, with the loss of 55 lives. It was on its way to Corfu, in Greece. Before takeoff, one of the engines failed, causing the fire, and...

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See the news Midair collisions to metal fatigue: tragedies that changed air travel | Business from Source New York Times on 17/03/2019 has been updated to day with the theme on feedixo.