Amid preparations for key demonstrations of commercial cargo and crew operations to low Earth orbit, Boeing has revealed studies of scaled-up, mini-space shuttle-like variants of the reusable X-37B orbital test vehicle (OTV) which could be used to return to a runway landing. The larger derivative could be developed for potential delivery of cargo and crew to the International Space Station (ISS), with flight tests of the current version paving the way for a more ambitious stretched version, according to the manufacturer.
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