Title

An electric helicopter with a9 h

Caption

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

Date

20th century

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP23A14_437

License type

Rights managed

Available size

60,0Mb (5,9Mb) / 17,2in x 13,5in / 5160 x 4064 (300dpi)

Keywords

20th Century Engraving Engraved Illustration Illustrated Electric Electricity Helicopter Flight Flying Aviation Transport Transportation Technology Tech Invention Inventor Motor 9 h.p. Motor Motor 20th Century