TIL Lockheed Skunkworks is working on SR-72, the successor to the legendary SR-71, with a speed of Mach 6 and powered by a radical new engine which combines the features of a turbine and a scramjet.

http://www.wired.com/2013/11/lockheed-martin-sr-72/



Submitted March 14, 2015 at 06:33PM by rgeek http://www.reddit.com/r/todayilearned/comments/2z0kdk/til_lockheed_skunkworks_is_working_on_sr72_the/