Why do plane windows have a little hole?

“The purpose of the breather hole, which is located near the bottom of the middle pane, becomes clear: it serves as a bleed valve, allowing pressure between the air in the passenger cabin and the air between the outer and middle panes to equilibriate,” Gonzalez explained.



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By pressing the control button at the bottom of the window, passengers are able to activate that electrochromic technology, sending an electric current through the gel sandwiched between the glass panels. The strength of the current determines the darkness of the reaction in the gel.

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The main reason is that the 787 has a composite construction instead of aluminum. This is more resistant to fatigue, and therefore allows larger windows to be installed. Fatigue is the main reason windows have been kept smaller in the past.

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no one ever does. Some aircraft can do a so-called 'powerback', but in most cases, airplanes either don't have this technical capability. Most airplanes can taxi backwards by using reverse thrust. This entails directing the thrust produced by the plane's jet engines forward, rather than backwards.

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What makes the plane so expensive? The 777-300ER can carry 365 passengers compared with the 787-9's capacity of 280. The GE engines on the 777 model develop 62% more thrust than the 787's two engines. The plane is also longer than the Dreamliner, has a greater wingspan and a greater wing area, and is taller.

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The sound comes from the rotary hydraulic motor situated in the wheel well of the jet which turns the drive shaft for the flap drive screw jacks.

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