At the end of the 1930s, the German company Telefunken tried to make a longwave transmission experiment with a captive helicopter driven with a three-phase, AC-power engine.
helicopter | Bell Helicopter | Helicopter | Budgie the Little Helicopter | Helicopter rotor | The Captive Mind | CHC Helicopter | The Captive Heart | Sea King helicopter | Helicopter Heroes | Captive breeding | 2012 Kenya Police helicopter crash | Yas'ur helicopter crashed | Utility helicopter | The Captive | Sichuan Lantian Helicopter Company Limited | Perenco Oil Helicopter crash | Light Helicopter Experimental | La Captive | helicopter rotor | Helicopter Rope Suspension Technique | Helicopter Girl | Firth Helicopter | Enstrom Helicopter Corporation | ''Closed on account of happiness.'' Two Danish resistance fighters are guarding a shop while the owner is celebrating the liberation of Denmark on 5 May 1945. The man on the left is wearing a captive German Stahlhelm | Captive Wild Woman | Captive plane | Captive Nations | Captive bolt pistol | Bell helicopter |