Although the American agency NASA formally deals with space issues, there are enough talented specialists to develop them to help improve life on earth. Or in the air - the other day a series of test flights ended, in which a serial aircraft flew with a glider modernized by space technologies. The changes are aimed at reducing the loudness of acoustic effects during maneuvers, which promises a small revolution in the industry.
The Gulfstream III was taken as a basis, all changes were made to the airframe design, the engine and its noise remained the same. Serious changes have occurred with the chassis - around the niches where the wheels are retracted, NASA engineers made a series of holes for controlled air passage. The landing gear received new, porous fairings, which create less air resistance and, as a result, less noise during takeoff and landing.
On the wings, on the contrary, they tried to get rid of the holes, now there are no voids between the wing and the flap. It uses an innovative seamless design with flexible space materials. Taken together, all the innovations have reduced the noise from the aircraft by 70%, and at the moment when it lands or takes off, that is, it is closest to people on the ground.
NASA does not say when the innovations will begin to be applied on production airliners and whether they will start at all. But if this happens, imagine that the constant loud hum over the airports will be reduced to the noise level from a busy highway. With what relief the inhabitants of the surrounding territories breathe a sigh! And then such "silent technologies" can come to the auto industry, and indeed anywhere.