Errymath: SR-72

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<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’s facilities in California.</a><br />
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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).<br />
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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.<br />
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<img alt="" data-aria-label-part="" src="https://pbs.twimg.com/media/DK6CzskUMAEAH1m.jpg" style="top: -0px; width: 100%;" /><br />
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An optionally piloted flight research vehicle (FRV) is also in the 
works to flight test elements of the SR-72 design. The FRV will be about
 the size of an F-22 and use a single combined-cycle engine for 
propulsion. Development of the FRV is expected to begin next year and 
first flights could occur as soon as 2020. Leading up to the FRV, 
Lockheed could be conducting ground and flight tests on even smaller 
demonstrators.<br />
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<img alt="" class="alignnone size-full wp-image-137289" height="431" src="https://www.nextbigfuture.com/wp-content/uploads/2017/09/6f3a902dc620b0f33f219aeb11a127de.jpg?x71037" width="700" /><br />
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<blockquote class="twitter-tweet" data-lang="en">
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<a href="https://twitter.com/hashtag/Hypersonic?src=hash&ref_src=twsrc%5Etfw">#Hypersonic</a> SR-72 <a href="https://twitter.com/hashtag/spyplane?src=hash&ref_src=twsrc%5Etfw">#spyplane</a> demo spotted<a href="https://twitter.com/hashtag/Aerospace?src=hash&ref_src=twsrc%5Etfw">#Aerospace</a> <a href="https://twitter.com/hashtag/scramjet?src=hash&ref_src=twsrc%5Etfw">#scramjet</a>  <a href="https://twitter.com/hashtag/6XSoundSpeed?src=hash&ref_src=twsrc%5Etfw">#6XSoundSpeed</a> <a href="https://twitter.com/LockheedMartin?ref_src=twsrc%5Etfw">@LockheedMartin</a> <a href="https://twitter.com/hashtag/Aerojet?src=hash&ref_src=twsrc%5Etfw">#Aerojet</a> <a href="https://twitter.com/hashtag/Rocketdyne?src=hash&ref_src=twsrc%5Etfw">#Rocketdyne</a>  <a href="https://t.co/sPkAK0VxyM">https://t.co/sPkAK0VxyM</a></div>
— Hugo Ángel (@hangel) <a href="https://twitter.com/hangel/status/913867111361073153?ref_src=twsrc%5Etfw">September 29, 2017</a></blockquote>
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<blockquote class="twitter-tweet" data-lang="en">
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Hypersonic SR-72 spyplane demo spotted <a href="https://t.co/Y2b6bca3wY">https://t.co/Y2b6bca3wY</a> <a href="https://t.co/jWrn38J3Eh">pic.twitter.com/jWrn38J3Eh</a></div>
— nextbigfuture (@nextbigfuture) <a href="https://twitter.com/nextbigfuture/status/913811601404432384?ref_src=twsrc%5Etfw">September 29, 2017</a></blockquote>
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Hypersonic SR-72 spyplane demo spotted

A subscale demonstrator of the SR-72 hypersonic spyplane was reportedly spied at Lockheed’s facilities in California. A proposed hyper...

Errymath

Hypersonic SR-72 spyplane demo spotted

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