humanoidhistory: X-15 on a research flight with a dummy ramjet engine attached to the bottom of its wedge-shaped vertical tail, 1967. (NASA)

humanoidhistory: X-15 on a research flight with a dummy ramjet engine attached to the bottom of its wedge-shaped vertical tail, 1967. (NASA)

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from: https://www.tumblr.com/blog/view/itspronouncedguy-care/148899270209