Aeronautics: Sky Cannon

Near Berlin last week newsmen stood behind protecting steel walls, stoppered their ears and watched a small cannon-like device vomit gases with a nerve-shattering roar. Two minutes of the din was all they could endure. The "cannon," mounted on an engine block, was Inventor Paul Heylandt's latest rocket motor propelled by burning of liquid oxygen and an alcoholic liquid. It was only two feet long, weighed 15 Ib. Installed in a hermetically sealed cabin airplane for stratospheric flight, the inventor said, it would propel the craft from Berlin to any point in...

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