original glasi:
"The XB-1, nicknamed the "Baby Boom," has a cruising speed of Mach 2.2-- 1,451 miles per hour-- which is 10 percent faster than the Concorde’s previous speed of Mach 2. It's also 2.6-times faster than the average commercial airliner." i moze se naci na http://www.foxnews.com/travel/2016/11/16/richard-branson-unveils-supersonic-baby-boom-passenger-jet.html