1919

From The Space Library

Adolph Rohrbach of Germany developed smooth-surface, metal-surfaced wings, combined with metal box-spar internal construction, the beginning of the stressed-skin concept.

Weather Bureau expended $100,000 to improve meteorological observations to support increasing aviation requirements, an appropriation granted by Congress in 1917 upon the recommendation of the NACA.

Junkers of Germany produced J-13 low-set, cantilever-wing transport, which carried a crew of two and four passengers.

• 1919
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• 1920