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Why did the Comet have square windows?
The windows’ square shape caused stress concentration by generating levels of stress two or three times greater than across the rest of the fuselage. In 2012 a finite element analysis was carried out to find the stress values in a digital model of the Comet’s cabin window loaded to a pressure differential of 8.25 psi.
When did planes stop having square windows?
1950s
It turns out when airplane windows were square, up until the 1950s, the planes flew slower and lower. As flying became more popular, airlines began to fly at higher altitudes to cut costs (there’s less drag up there, which limits unnecessary fuel use).
Why don’t planes have square windows?
As commercial air travel took off in the mid-20th century, airline companies began to fly at higher altitudes to save money—the air density is lower up there, creating less drag for airplanes. But at first, plane builders left in the standard square windows and this expansion meant catastrophe.
Why are there small holes in airplane windows?
Known as “bleed holes,” they are a feature of airplane windows and not a defect or sign of damage. Their purpose is to balance the air pressure so that the outer pane of a window is exposed to pressurized air rather than the inner pane.
What was the cause of the comet crash?
After the conclusive evidence revealed in the inquiry that metal fatigue concentrated at the corners of the aircraft’s windows had caused the crashes, all aircraft were redesigned with rounded windows. It took four years for de Havilland to get the redesigned Comet re-certified for commercial service.
What happens to a comet as it gets closer to the Sun?
As the comet gets closer to the Sun, some of the ice starts to melt and boil off, along with particles of dust. These particles and gases make a cloud around the nucleus, called a coma. The coma is lit by the Sun. The sunlight also pushes this material into the beautiful brightly lit tail of the comet.
What was the name of the village that was destroyed by a comet?
A new analysis of samples of soil and artifacts salvaged from the original excavation has revealed a surprising finding: The Paleolithic village at Abu Hureyra was indirectly hit and destroyed by fragments of a comet that slammed into Earth about 12,800 years ago.
How long did it take for Comet to be re-certified?
It took four years for de Havilland to get the redesigned Comet re-certified for commercial service. In the meantime, the American aircraft manufacturer, Boeing, had released its 707 passenger jet, which could carry almost twice as many passengers.