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9
Who invented the helicopter?
The first helicopter was built by a Russian engineer named Igor Sirkorsky.
The year was 1939.
The year was 1939.
Tags:
Quelle: Usborne Book of Inventors and Inventions.
Quelle: Usborne Book of Inventors and Inventions.
Karteninfo:
Autor: CoboCards-User
Oberthema: Social Science
Thema: Inventors and Inventions
Schule / Uni: University of Albany
Ort: New York
Veröffentlicht: 24.03.2013