A quiet word about noise….

March 26, 2010 at 3:48 am | Posted in 1 | Leave a comment

We’ve all heard it. That growing roar as a plane approaches, the deafening sound when the plane is overhead and the constant ringing in your ears after it leaves. For many people this is just part of the joy of aviation. However, what if you could make that noise go away… or at least turn into a whisper. Enter the 787. Along with its increase in fuel efficiency, warmer lighting, bigger windows and nicer seats, the 787 is also reducing the noise standards for commercial aircraft. Perhaps the most interesting part about it is how it is being done. Chevrons… no not the gas station… are formed in the trailing edge of the engine nacelle to reduce the amplitude of the  sounds waves coming from the jet exhaust. The exact engineering behind this is rather complicated and something I don’t claim to know. However, check out the following article for more information on the 777 chevrons http://www.seattlepi.com/business/236095_quietjet11.html.

The following pictures shows a good view of the chevrons on the 787. The chevrons are the wavy parts of the engine fairing at the back of the structure.


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