Thrust Vectoring Drone Design for VTOL
Thrust vector control systems in VTOL drones operate under constrained optimization parameters. Field measurements show that transition phases between vertical and horizontal flight modes create complex aerodynamic interactions, with thrust losses of 15-30% and momentary control instabilities lasting 0.5-2.5 seconds. These critical transition moments demand precise thrust vector alignment within ±2° tolerance while managing power fluctuations that can spike to 3.5 times hover consumption.
The fundamental engineering challenge lies in designing systems that maintain stable, controllable flight through multiple thrust vector configurations while minimizing the weight and complexity penalties that compromise range and endurance.
This page brings together solutions from recent research—including tilting propeller systems that enable smooth vertical-to-horizontal transitions, independently controlled proprotors mounted strategically around fixed wings, hybrid propulsion architectures combining dedicated vertical lift with forward thrust, and dynamic flight surface locking mechanisms. These and other approaches offer practical implementations for achieving reliable VTOL capability while preserving aerodynamic efficiency during cruise flight.
1. VTOL Aircraft with Main Wing Tilting Propeller System for Vertical and Horizontal Flight Transition
DR NAKAMATS INNOVATION INSTITUTE, 2024
A vertical takeoff and landing (VTOL) aircraft that combines the benefits of helicopters and fixed-wing aircraft. The aircraft features a main wing with a tilting propeller system that enables both vertical and horizontal flight modes. The propellers can change angle from 0° to 90° to transition between vertical takeoff and landing, hovering, and horizontal flight. The design eliminates the aerodynamic inefficiencies and structural issues associated with traditional VTOL aircraft, enabling fast horizontal speeds, long-range flight, and all-weather operation.
2. VTOL Aircraft with Cylindrical Fuselage and Integrated Cross-Shaped Wings Housing Five Propulsion Units
PEREIRA FILHO ALBERTO CARLOS, 2024
VTOL aircraft with a cylindrical fuselage and integrated cross-shaped wings, featuring five propellers: four wingtip thrusters for vertical takeoff and low-speed control, and a central propeller for high-speed horizontal flight. The design combines vertical takeoff and landing capability with high-speed flight and long-range autonomy, enabled by optimized aerodynamic coefficients and dual flight control systems.
3. Free Propeller Assembly with Circular Shaft and Signal Transmission for Rotor Blade Control
YU-CHIA LIU, BAO-SHEN LIU, 2024
A free propeller assembly structure for aircraft, comprising a circular shaft, main rotor, signal transmitting device, and rotor blade assembly, where the rotor blades are mounted to blade mounting structures on the main rotor and driven by motors, and the signal transmitting device enables electronic or photonic signal transmission between the rotor blades and main rotor. The assembly is designed for vertical takeoff and landing aircraft, enabling flexible rotor blade angles and improved performance in various environments.
4. Hybrid UAV with VTOL Rotating Wing System and Integrated Autopilot Control
SIA FIXAR AERO, 2024
A hybrid unmanned aerial vehicle (UAV) with vertical take-off and landing (VTOL) capabilities, featuring a fixed wing configuration with rotating wings for level flight. The VTOL system comprises two pairs of rotors, one pair mounted at a fixed angle above the wing and the other below, with the center of gravity located at the intersection of the rotor axes. The fixed wing configuration includes a rear horizontal stabilizer and a pair of second wings, while the VTOL system is controlled by an integrated autopilot module that calculates and applies control signals to both the rotors and fixed wing.
5. Drone with Rocket-Propelled Vertical Launch and Deployable Electric Propellers
MARTEL JOSEPH WILLIAM RANDAL, 2024
A remotely controlled wireless drone that employs a rocket engine to quickly reach a desired altitude or location, with electrically-driven propellers that are stowed during rocket firing and deployed afterwards to control the drone's position and altitude. The drone's design enables rapid vertical takeoff and transition to horizontal flight, with the rocket engine providing the initial propulsion and the propellers taking over for sustained flight.
6. Electrically Powered Rotorcraft with Dual Rotor Blades and Common Pitch-Angle Shaft Controlled by Limited-Angle Motor
SIFLY AVIATION INC, 2024
An electrically powered rotorcraft with a rotor having a rotor hub and a pair of rotor blades mounted to the rotor hub on opposite sides thereof, the rotor being rotatably mounted on a primary drive shaft, and a rotary electric motor coupled to the drive shaft. The rotorcraft includes a limited-angle electric motor, such as a stepper motor, coupled to a common pitch-angle shaft shared by the two rotor blades, and a control system that applies cyclic response through the limited-angle motor to cause differential blade incidence. The control system receives a PWM signal from the flight control computer every 10 mS, indicating the desired position of the common blade pitch shaft, and adjusts the phase and magnitude of the cyclic response to achieve the desired thrust offset.
7. VTOL Aircraft with Independently Tiltable Proprotors Mounted Forward and Aft of Fixed Wings
ARCHER AVIATION INC, 2024
VTOL aircraft with fixed wings that can hover, take off and land vertically like a helicopter and then transition to forward flight like a conventional fixed wing aircraft. The aircraft has independently tiltable proprotors mounted forward and aft of the wings. This allows all proprotors to be used in all flight modes, reducing drag during forward flight compared to fixed blades during vertical flight. The independent tilt control provides additional stability and maneuverability benefits.
8. Unmanned Aerial Vehicle with Single-Axis Power Drive System for Unified Rotor Control
BAR HAGAY, 2024
Unmanned aerial vehicle (UAV) with enhanced maneuverability and operational flexibility through a novel control system. The UAV features a single-axis power drive system with a single motor, eliminating the need for separate control systems for vertical takeoff and landing and horizontal flight. The power drive system enables simultaneous control of all four rotors, including the rear rotors, through a single transmission unit. This configuration provides increased maneuverability and simplifies operation compared to conventional UAV designs. The system also enables the UAV to maintain hover angles while operating in both vertical and horizontal flight modes.
9. Device for Dynamic Locking and Unlocking of Flight Surfaces in VTOL Aircraft
COLUGO SYSTEMS LTD, 2024
Device and method for controlling flight mode transitions in VTOL aircraft by dynamically locking and unlocking flight surfaces. The device enables precise control of wing position during transitions between vertical and horizontal flight modes by locking the wing in its optimal position before transition, allowing it to rotate to the correct position just prior to locking. This enables stable flight mode transitions without the need for complex flight control systems. The device can be integrated into VTOL aircraft to provide a reliable and efficient means of transitioning between flight modes.
10. Aircraft with Tiltable Un-Ducted Rotors and Ducted Fans for Dual-Mode Orientation
TEXTRON INNOVATIONS INC, 2024
Aircraft with tiltable un-ducted rotors and tiltable ducted fans that transition between forward thrust and vertical lift orientations. The aircraft features two wings with tiltable ducted fans at the wingtips, and two booms with tiltable rotors and aft rotors. In vertical takeoff and landing (VTOL) mode, the rotors and ducted fans rotate in a horizontal plane, while in forward flight mode, they transition to a vertical plane.
11. Unmanned Aerial Vehicle with Integrated Ion Thruster and Thrust Vectoring System for Vertical Thrust and Directional Control
UNDEFINED TECH CORP, 2023
An unmanned aerial vehicle (UAV) with vertical takeoff and landing (VTOL) capability that generates low noise levels. The UAV uses an ion thruster with asymmetrical electrodes subjected to a potential differential to produce vertical thrust, and a vector thrusting device to control roll, pitch, and yaw. The ion thruster electrodes are integrated into the primary structure of the craft, eliminating the need for separate engines or wings. A thrust vectoring system with pivoting fans enables controlled flight in any direction while maintaining low noise levels.
12. Convertible Aircraft with Rotating Nacelles for Dual-Mode Flight Capability
LEONARDO SPA, 2023
Convertible aircraft for sports competition or personal air mobility, capable of switching between hovering/vertical flight and forward flight configurations. The aircraft features a pair of nacelles housing motors and rotors that rotate around a third axis, connected to the motors. The design enables high stability and reduced aerodynamic drag while overcoming traditional helicopter limitations in terms of altitude and speed.
13. Flight Vehicle with Independently Controllable Linear Thrust Generating Subunits and Central Axis Pivot Joints
KAWASAKI JUKOGYO KABUSHIKI KAISHA, 2023
Flight vehicle with improved stability and maneuverability, featuring a thrust generating unit with multiple subunits, each comprising independently controllable thrust generators arranged in a line. The subunits are connected to the vehicle body through joints that permit free pivoting around a central axis, allowing for coordinated torque generation and control. The vehicle's control system adjusts thrust levels in each subunit to balance opposing torques and maintain desired angular positions, enabling precise attitude control and enhanced stability during flight.
14. Wing-Embedded Electroaerodynamic Thrusters with Integrated Ion Sources and Collectors
MASSACHUSETTS INSTITUTE OF TECHNOLOGY, 2023
Surface-integrated electroaerodynamic (EAD) thrusters for aircraft propulsion that reduce drag and improve efficiency by integrating ion sources and collectors directly into the wing surface, eliminating the need for external thrusters and associated drag. The thrusters utilize a voltage differential to generate ions that collide with air molecules, producing thrust while minimizing drag. The integrated design enables reduced drag, mass savings, and simplified structural components compared to conventional EAD thrusters.
15. Vertical Takeoff Tail-Sitter Aircraft with Rotating Half-Wings and Integrated Vertical Fuselage
LEONARDO SPA, 2023
Tail-sitter aircraft design that allows vertical takeoff and landing like a helicopter but faster, simpler, and with comparable performance to traditional airplanes. The tail-sitter has a vertical fuselage with wings that rotate from vertical to horizontal for forward flight. The key innovation is that the wings are shaped like half-wings that are flush with the fuselage in the vertical position, avoiding the large vertical surface area that limits other tail-sitter designs. By rotating the half-wings horizontally for forward flight, the tail-sitter achieves conventional aircraft performance. It lacks a tail fin or other movable surfaces beyond the rotating wings, simplifying the design.
16. Convertible UAV with Tilt-Rotor and Detachable Wing Sections on Rotating Shafts
FUVEX CIVIL SL, 2023
Convertible unmanned aerial vehicle (UAV) with tilt-rotor and tilt-wing characteristics that can switch between vertical takeoff/landing and forward flight. The UAV has a fuselage with wings mounted on rotating shafts perpendicular to the fuselage axis. The wings have detachable front and rear sections that slide together. In vertical mode, the wings rotate freely around the shafts while the rotors provide lift. In forward flight, the wings stay fixed and the rotors push the UAV. The detachable wing sections have cutouts for the rotors. This allows the wings to rotate without colliding during transitions. The UAV can convert between flight modes without disassembly.
17. Flying Vehicle with Wing-Mounted Tilt-Rotor and Stacked Vertical Thrust Rotor Assemblies
VERTICAL AEROSPACE GROUP LTD, 2023
Flying vehicle with distributed propulsion system comprising a pair of rotor assemblies, each comprising a tilt-rotor and a stacked plurality of vertical thrust rotors, mounted on the wings to provide redundancy and efficiency during vertical takeoff and landing (VTOL) and high-speed cruise operations.
18. Electric Aircraft with Longitudinal Thrust Component for Yaw Force Generation and Stability Control
BETA AIR LLC, 2023
An electric aircraft for generating a yaw force, comprising a fuselage, laterally extending elements secured to the fuselage, lift components attached to the elements, and a longitudinal thrust component configured to generate a yaw force. The aircraft includes a flight controller that determines a yaw correction based on sensor data from the lift components, enabling the aircraft to maintain stability and control in the event of a lift component failure.
19. Twin-Fuselage Electric Tiltrotor Aircraft with Central Connecting Section and Integrated Rotor-Motor Assemblies
TEXTRON INNOVATIONS INC, 2023
Twin-fuselage arrangement for electric tiltrotor aircraft, comprising two fuselages connected by a central section, with each fuselage housing a rotor and electric motor, enabling vertical takeoff and landing capability while maintaining a compact footprint suitable for urban air mobility applications.
20. Vertical Takeoff and Landing UAV with Inboard-Mounted Lift Rotors for Compact Form Factor
WING AVIATION LLC, 2023
A compact, efficient, and safe vertical takeoff and landing (VTOL) UAV design that enables enhanced package delivery capabilities in densely populated areas. The UAV incorporates inboard-mounted lift rotors that provide increased vertical thrust during vertical ascents and descents, while maintaining a compact and agile form factor. This design enables VTOL operations in tight urban environments, with the added benefit of increased payload capacity compared to conventional fixed-wing designs. The inboard-mounted rotors reduce rotor blade extension beyond wing tips, while maintaining safety through reduced rotor contact with external objects. The resulting compact, efficient VTOL system enables efficient package delivery in urban areas without compromising payload capacity.
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