Rotary wing aircraft

Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and paddle wheel sustained

Reexamination Certificate

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C244S012100

Reexamination Certificate

active

11121648

ABSTRACT:
A rotary wing aircraft is provided with longitudinally oriented counter-rotating rotors with circumferentially spaced variable pitch elongated rotor blades connected at their opposite ends to rotatable support rings mounted on the aircraft fuselage. Rotor downwash may be guided laterally and longitudinally by respective sets of moveable guide vanes. Propulsion may be obtained by an engine providing thrust and power take-off for driving the rotors. An auxiliary or second engine may be drivingly connected to the rotors.

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Kim, Seung Jo, et al., Design and Development of Unmanned VTOL, Cyclocopter, Seoul National University, Seoul, Korea, date unknown, 6 pp.
Yun, Chul Yong, et al., Thrust Control Mechanism of VTOL UAV Cyclocopter With Cycloidal Blades System, Department of Aerospace Engineering, Seoul National University, Seoul, Korea, date unknown, 2 pp.
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Kim, Seung Jo, et al., “Design and Performance of Tests of Cycloidal Propulsion Systems,” American Institute of Aeronautics and Astronautics, Apr. 7, 2003, 11 pp.
Kim, Seung Jo, et al., “Aerodynamic Loads Prediction of the Cycloidal Blades System of UAV Cyclocopter Considering Virtual Camber Effect,” School of Mechanical and Aerospace Engineering, Seoul National University, Oct. 7, 2003, 8 pp.
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Hwang, In Seong, et al., “Multidisciplinary Optimal Design of Cyclocopter Blade System,” American Institute of Aeronautics and Astronautics, Apr. 18, 2005, 7 pp.

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