XB-70 Valkyrie - Air Force Marathon https://www.usafmarathon.com/tag/xb-70-valkyrie/ Thu, 05 Aug 2021 18:13:31 +0000 en-US hourly 1 https://wordpress.org/?v=6.2.9 https://www.usafmarathon.com/wp-content/uploads/2017/09/cropped-USAAC_Roundel_1919-1941-32x32.png XB-70 Valkyrie - Air Force Marathon https://www.usafmarathon.com/tag/xb-70-valkyrie/ 32 32 Experimental: North American XB-70 Valkyrie https://www.usafmarathon.com/2021/08/06/xb-70-valkyrie-2/?utm_source=rss&utm_medium=rss&utm_campaign=xb-70-valkyrie-2 https://www.usafmarathon.com/2021/08/06/xb-70-valkyrie-2/#respond Fri, 06 Aug 2021 12:00:18 +0000 https://www.usafmarathon.com/?p=13473 Experimental: History & Heritage of the North American XB-70 Valkyrie The XB-70 Valkyrie started as a prototype for the B-70, a high-altitude, nuclear strike bomber. The Valkyrie had six engines that allowed the aircraft to fly at Mach 3+, which is three times the speed of sound. No such enemy could defend against a bomber

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