Engineering Quiet, Efficient Planes
Posted on March 5, 2007 Comments (1)
Fly Silent, Fly Cheap by Jeffrey Winters, Mechanical Engineering magazine:
In all, the design changes would amount to a startling reduction in the amount of sound produced on takeoff and landing. The Cambridge-MIT team estimates that a landing SAX-40 would create less than 65 decibels of noise at the perimeter of the airport—about the same level as background noise. Transformed in this way, airplanes would be relatively neutral parts of the urban environment, rather than nuisances.
But there’s a side benefit: fuel efficiency. The same design elements that cut back on noise also reduce fuel consumption. With less energy lost to creating turbulence, more power would be devoted to moving passengers.
Related: Silent Aircraft Initiative (photo from here) – previous post on SAI – A plane You Can Print – Engineering the Boarding of Airplanes