Sonic boom

• 6 January, 2015
• Video

A sonic boom is usually heard as a deep double “boom” as the aircraft is usually some distance away. However, as those who have witnessed landings of space shuttles have heard, when the aircraft is nearby the sonic boom is a sharper “bang” or “crack”.
http://en.wikipedia.org/wiki/Sonic_boom

httpv://www.youtube.com/watch?v=7yh7QSMrdsA

via

• interesant
• jet