NASA has taken a huge leap forward in its quest to create an aircraft that can travel faster than the speed of sound without causing the ear-splitting sonic boom.
https://www.space.com/40187-lockheed-martin-building-quiet-supersonic-jet.html
NASA has taken a huge leap forward in its quest to create an aircraft that can travel faster than the speed of sound without causing the ear-splitting sonic boom.
https://www.space.com/40187-lockheed-martin-building-quiet-supersonic-jet.html
