"In 1911 B.N.Yuriev (then student) completed development of theoretical concept of a helicopter with single main rotor. This concept included collective and cyclic pitch, anti-torque tail propeller. Layout of his helicopter has now become a classical scheme, so common that it seems that 'it always was that way'.
Planned 70hp Gnome engine was replaced by 30hp Anzani, rotor blades were fixed. Front section was of wooden construction, uncovered rear fuselage was of bamboo. Goals were limited by study of trust and reaction of rotors.
Prototype was ready on Spring 1912, and got a golden medal on the Second International Airplane Show in Russia as a 'remarkable theoretical project'.
Experiments were carried out during Fall 1912.
Yuriev and his fellow students started to develop a unified 'engine-rotor' group to be used in single and multi-rotor helicopters, including engine of their own design. But outbreak of world war one stopped the project completely, its participants were drafted."
Planned 70hp Gnome engine was replaced by 30hp Anzani, rotor blades were fixed. Front section was of wooden construction, uncovered rear fuselage was of bamboo. Goals were limited by study of trust and reaction of rotors.
Prototype was ready on Spring 1912, and got a golden medal on the Second International Airplane Show in Russia as a 'remarkable theoretical project'.
Experiments were carried out during Fall 1912.
Yuriev and his fellow students started to develop a unified 'engine-rotor' group to be used in single and multi-rotor helicopters, including engine of their own design. But outbreak of world war one stopped the project completely, its participants were drafted."
Yuriev Helicopter 1912
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