Stratolaunch's huge Roc aircraft took to the skies for the second time this week, successfully completing a test flight that lasted more than three hours.
source https://www.digitaltrends.com/news/watch-the-worlds-largest-plane-ace-its-second-test-flight/
source https://www.digitaltrends.com/news/watch-the-worlds-largest-plane-ace-its-second-test-flight/
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