Science: Vertical Flight

Big drawback of the airplane for private use is that it must have broad, obstacle-free fields for take-offs and landings. To compete with the automobile, air transport needs a machine that takes off straight up, lands straight down, remains under control at any speed or no speed. Beginning with Leonardo da Vinci, air designers have tinkered with vertical-lift machines. They wound up definitely nowhere until famed German Designer Heinrich Focke built a practical helicopter that is said to be working with German troops.*

Another famed modern helicopter man is a shy, voluble, fringe-haired...

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