Engraving depicting an electric helicopter with a 9 motor. Dated 20th Century

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Size: 5160px × 4064px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: .., 9, archival, archive, century, electric, engraving, engravingengravedillustrationillustratedelectricelectricityhelicopterflightflyingaviationtransporttransportationtechnologytechinventioninventormotor9, helicopter, historical, history, motor, motormotor20th