Word: flamme
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Dates: during 1924-1924
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Navigation. A giant submarine cruiser of more than 7,000 tons, invented by Prof. Oswald Flamm, of Germany, has been built in model by the Augsburg-Nürnberger Machin-fabrik. The boat is heartshaped, point upward, with the keel in the groove of the heart, like an inverted V. The principal advantage is rapid and even submersion, the stability depending on the form and the distribution of pressure. It can submerge in 30 seconds without turning a degree, can cruise 20,000 miles and develop a speed of 23 knots an hour. It is 525 ft. long...