THE HISTORY of the flying car is almost as old as that of powered flight itself. It started with the Curtiss Autoplane of 1917, an awkward-looking contraption with detachable wings. It never left the ground. Later machines made it into the skies but failed to take off commercially. Money is now pouring into flying taxis. On March 30th Lilium, a German company that develops them, announced a reverse merger with a special-purpose acquisition company (SPAC) that values it at $3.3bn—a sign that investors think the business will fly.
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