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The first helicopter was built in 1936. Helicopters use spinning rotors to create lift. They are used in a variety of jobs, from search and rescue to reporting on traffic. Discover the history, design, and features of these exceptional flying machines in Helicopters, part of the Flying the Sky series.
- Format: Inbunden
- ISBN: 9781791118600
- Språk: Engelska
- Antal sidor: 32
- Utgivningsdatum: 2020-08-01
- Förlag: Av2