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Scientific American

July 1, 1941

1 min read

Helicopter Records

Rotary Aircraft Operates as Seaplane Or Amphibian Helicopter

By Alexander Klemin

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This article was originally published with the title “Helicopter Records” in Scientific American Magazine Vol. 165 No. 1 (July 1941), p. 34
doi:10.1038/scientificamerican0741-34

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