SlickDriver
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For those that thought the Focke-Wulf Triebflugel was an original design I found Kucfir’s VTOL project of 1918-1919.
Konrad Kucfir a Polish inventor applied for a patent on 14 April 1919 for his tail-sitter. Basically a single/two-seat biplane standing vertically on a large tripod frame structure embracing a normal monoplane tail unit. Instead of a normal aircrew, the aircraft had another set of biplane wings with planes shaped like propeller blades which, mounted horizontally above the standing aircraft, rotating around its vertical axis. Providing vertical life for take-off and hover and propulsion in normal flight.
The propeller wings were attached to a central drum structure which carried two radial engines mounted back to back, and two airscrews, one in front of the leading edge of each set of propeller planes, were driven by chain or rope gearings from the engines.
The propeller wings and normal wings were fitted with ailerons, and transition form vertical to horizontal flight was to be effected by the elevator movement.
The tripod landing frame over the tail was to be equipped with shock-absorbers.
The patent also envisaged a number of variations of the design, including a monoplane propeller wing and one or more engines.
Poland granted patent number 1707 on 4 March 1925.
My scanner is still packed so I will post a drawing once that gets hooked up. There is no other data available.
Konrad Kucfir a Polish inventor applied for a patent on 14 April 1919 for his tail-sitter. Basically a single/two-seat biplane standing vertically on a large tripod frame structure embracing a normal monoplane tail unit. Instead of a normal aircrew, the aircraft had another set of biplane wings with planes shaped like propeller blades which, mounted horizontally above the standing aircraft, rotating around its vertical axis. Providing vertical life for take-off and hover and propulsion in normal flight.
The propeller wings were attached to a central drum structure which carried two radial engines mounted back to back, and two airscrews, one in front of the leading edge of each set of propeller planes, were driven by chain or rope gearings from the engines.
The propeller wings and normal wings were fitted with ailerons, and transition form vertical to horizontal flight was to be effected by the elevator movement.
The tripod landing frame over the tail was to be equipped with shock-absorbers.
The patent also envisaged a number of variations of the design, including a monoplane propeller wing and one or more engines.
Poland granted patent number 1707 on 4 March 1925.
My scanner is still packed so I will post a drawing once that gets hooked up. There is no other data available.
