{"id":72931,"date":"2017-09-30T15:42:46","date_gmt":"2017-09-30T22:42:46","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2017\/09\/hypersonic-sr-72-spyplane-demo-spotted"},"modified":"2017-09-30T15:42:46","modified_gmt":"2017-09-30T22:42:46","slug":"hypersonic-sr-72-spyplane-demo-spotted","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2017\/09\/hypersonic-sr-72-spyplane-demo-spotted","title":{"rendered":"Hypersonic SR-72 spyplane demo spotted"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/hypersonic-sr-72-spyplane-demo-spotted.jpg\"><\/a><\/p>\n<p><a href=\"http:\/\/www.popularmechanics.com\/military\/aviation\/news\/a28420\/hypersonic-sr-72-demonstrator-reportedly-spotted-at-skunk-works\/\" target=blank>A subscale demonstrator of the SR-72 hypersonic spyplane was reportedly spied at Lockheed\u2019s facilities in California.<\/A><\/p>\n<p>A proposed hypersonic reconnaissance and strike aircraft, the SR-72 would serve as a replacement for the famed SR-71 Blackbird, which was retired by the Air Force back in 1998. The SR-71 Blackbird could fly at 2200 mph (over 3 times the speed of sound).<\/p>\n<p>Lockheed has said they are working on a combined-cycle engine. It uses both a turbine and a scramjet to achieve hypersonic speeds. Lockheed Martin is testing Aerojet Rocketdyne from 2013 to 2017. Two combined-cycle engines are planned to power the SR-72, which is designed to be about the same size of the SR-71 and could achieve first flight in the late 2020s.<\/p>\n<p><!-- Link: <a href=\"https:\/\/www.nextbigfuture.com\/2017\/09\/hypersonic-sr-72-spyplane-demo-spotted.html\">https:\/\/www.nextbigfuture.com\/2017\/09\/hypersonic-sr-72-spypl...otted.html<\/a> --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A subscale demonstrator of the SR-72 hypersonic spyplane was reportedly spied at Lockheed\u2019s facilities in California. A proposed hypersonic reconnaissance and strike aircraft, the SR-72 would serve as a replacement for the famed SR-71 Blackbird, which was retired by the Air Force back in 1998. The SR-71 Blackbird could fly at 2200 mph (over 3 [\u2026]<\/p>\n","protected":false},"author":367,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1491],"tags":[],"class_list":["post-72931","post","type-post","status-publish","format-standard","hentry","category-transportation"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/72931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/367"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=72931"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/72931\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=72931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=72931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=72931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}