The "Helicopter", A Vertical Airplane

Titolo: The "Helicopter", A Vertical Airplane
Oggetto: en Imagined technology & prototypes; en Airplanes and Zeppelins
Article Title and/or Image Caption: The "Helicopter", A Vertical Airplane
Autore secondario: Robert G. Skerrett (writer)
Lingua: eng
Copertura temporale: interwar period
Data di rilascio: 1920-01
pagine: 868-869
Diritti: Public domain
Referenzia: Peter Cooper Hewitt; Thomas Edison; Columbia University; New Jersey
Archived by: Mikhail Vsemirnov; Alberto Bordignon (Supervisor)