NASA explores ‘quiet’ supersonic flight over land
 

Today, NASA announced its latest experimental aircraft called the Low-Boom Flight Demonstrator (LBFD). The agency signed a contract to design the plane back in 2016; now it's ready to proceed with development and construction. If the LBFD is successf...

https://www.engadget.com/2018/04/03/...fd-test-plane/