Science and Inventions. May, 1923. The Automobile of 1973
The personal helicopter or the helicopter-taxi was not too audacious idea for the twentieth century; at some stage, it had gained the physical shape, was embodied in the real industrial models, for example – Kamov’s diminutive and very practical helicopter Ka-26; but the idea slowly died in a digital heart of now days.
Mechanix Illustrated. Nov, 1941. This Helicopter-Car Flies Over Traffic!
Mechanix Illustrated. Jan, 1951. Helicopters for Everybody by Frank Tinsley
Popular Mechanics. Feb, 1951. Personal Helicopter
Znanie-sila. Jan, 1956. Air Motorcycle K-10 by V.Pustovalov
Znanie-sila. Feb, 1956. Air Taxi, Illustration by K.Kuzginov
Tekhnika-molodyozhi. Apr, 1970. Diminutive and Practical Soviet Helicopter Ka-26