VERTICAL TAKE-OFF AND LANDING AIRCRAFT WITH AFT ROTOR TILTING

Smart overview of the Invention

The vertical take-off and landing (VTOL) aircraft features a fuselage and at least one wing, with proprotors strategically mounted to provide both lift and forward thrust. The design incorporates two sets of proprotors: one positioned forward of the wing's leading edge and the other aft of the wing's trailing edge. Each set of proprotors is independently tiltable, allowing for versatile configurations that support vertical take-off, landing, and forward cruising.

Advantages of Independently Tiltable Proprotors

The independently tiltable proprotors offer significant advantages over traditional fixed rotor designs. By enabling all proprotors to be used during all flight stages, the aircraft minimizes drag during forward flight. This configuration also enhances control, allowing for precise adjustments to yawing moments and improving overall maneuverability. Additionally, the use of proprotors with more than two blades reduces unsteady aerodynamic loading, thereby decreasing noise and vibration.

Enhanced Control and Redundancy

The aircraft's control system allows for independent tilting of individual proprotors, providing additional degrees of freedom. This capability is particularly beneficial for generating yawing moments and enhancing control during various flight phases. The increased control redundancy means that proprotors can be smaller compared to those on aircraft with fixed rotors, potentially reducing the aircraft's overall weight and improving efficiency.

Design Features and Flexibility

The aircraft's design includes proprotors that are not limited to two blades, unlike non-tilting aft rotors. This flexibility allows for the use of three or more blades, which can operate at lower tip speeds to reduce acoustic signatures while meeting thrust requirements. The proprotors are also capable of tilting beyond ninety degrees, offering further versatility in flight dynamics and control.

Potential Applications and Power Considerations

The VTOL aircraft may be powered electrically, with each proprotor capable of generating at least 10 kilowatts. This design is suitable for both manned and unmanned applications, offering a modern solution for direct travel to destinations. The adaptability of the proprotor system enhances the aircraft's performance and efficiency across different flight conditions, making it a promising candidate for future aviation technologies.