The world’s first jet-propelled aircraft was actually a jury-rigged prop plane. There have been several claimants to the distinction of being the first jet- propelled airplane—including the Caproni Campini N.1 and Heinkel He-178—but a strong case can be made for a most unlikely candidate. In mid-1939 the second prototype of the propeller-driven Heinkel He-118 was …
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