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Why are aircraft windows round?

Why are aircraft windows round?

The de Havilland DH 106 Comet was the world’s first commercial jetliner and was developed and manufactured by de Havilland, United Kingdom. The new passenger aircraft was simply called Comet 1.

On 27 July 1949 the prototype of the aircraft succeeded in its first flight. Before starting with the planned passenger flight, the engineers developed a series of tests to ensure the safety of the passengers during the flight.

It took until 1952 for the Comet 1 to start transporting passengers. For its time the aircraft offered a relatively quiet, comfortable and fast way to travel and the Comet 1 showed promising signs of becoming a financial success. However, after a year in commercial service three of the aircrafts fell dramatically and catastrophically from the sky. It seemed as if they were breaking up. First, the weather was blamed but after the accidents continued the aircraft was withdrawn from service. At this time, investigations revealed why the aircrafts were breaking up. The manufacturer initiated an intensive series of tests and finally the reason was found.

The Comet 2 was developed and in contrast to the Comet 1 the improved aircraft had round windows. A feature that not only the following Comet aircrafts inherit but so did all other aircrafts independently manufactured around the world. Nowadays, aircrafts are essential in our society to transport passengers to every part of the globe. After the failure of the first commercial passenger aircraft a huge industry of aircraft producers and airlines took off. Together they are transporting millions of passengers each year, all of them with aircraft with round windows.

The first Flight off the De Havilland Comet :

 

The simulated crash of the De Havilland Comet:

 

 

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