Magnetic Rotor Alignment for VTOL Aircraft Drag Reduction
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Solution Overview
Problem
Existing VTOL aircraft face inefficiencies in non-VTOL flight operations due to uncontrolled VTOL rotors introducing drag, and conventional magnet-based alignment systems are insufficient or unreliable, especially with larger motors.
Innovation Solution
A motor mount and bearing housing system with alternating magnetic poles that, when the motor is disengaged, causes the rotor alignment magnets to rotate the motor to a position where the VTOL rotor is aligned parallel to the aircraft's longitudinal axis or apparent wind, minimizing drag during fixed-wing flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional magnet-based alignment systems are used to align VTOL rotors during non-VTOL flight, then drag reduction is achieved, but the alignment forces are insufficient and the system is unreliable, especially with larger motors
Solution Approach 1:
The patent replaces the conventional mechanical alignment system with a magnetic alignment system. Magnets are embedded in the motor housing and rotor, creating magnetic attraction/repulsion forces that automatically align the rotor with the motor's magnetic field. This eliminates the need for mechanical linkages, gears, or motors to achieve alignment, providing a more reliable and maintenance-free solution that works effectively with larger motors.
Solution Approach 2:
The magnetic alignment system is self-actuating and requires no external control or power source. The magnets inherently generate the alignment forces through their magnetic fields, automatically positioning the rotor in the optimal alignment position during non-VTOL flight without requiring additional actuators, sensors, or control systems.
2Use of energy by moving object
If VTOL rotors are left uncontrolled during fixed-wing flight to conserve fuel or battery power, then energy consumption is reduced, but drag increases due to unaligned rotors
Solution Approach 1:
The magnetic alignment system operates passively without requiring external energy input. The permanent magnets continuously generate the magnetic field that aligns the rotor, eliminating the need for additional power consumption while maintaining optimal rotor alignment. This resolves the contradiction by providing drag reduction without any extra energy cost beyond what is already required for motor operation.
Solution Approach 2:
The patent replaces active mechanical alignment systems that would consume additional power with a passive magnetic field-based system. The magnetic alignment occurs automatically through the interaction of magnetic fields, requiring no additional energy input while continuously maintaining optimal rotor positioning for minimal drag during fixed-wing flight.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The magnetic alignment system effectively reduces drag by ensuring VTOL rotors are aligned during non-VTOL flight operations, improving the efficiency and fuel/battery conservation of hybrid VTOL aircraft.
Implementation Method 1
attraction between the first and second rotor alignment magnets causes the magnet support structure to rotate relative to the bearing assembly to an alignment position
Implementation Method 2
the first plurality of rotor alignment magnets are oriented such that their magnetic axes are substantially parallel to the thrust axis
Data Source
AI summary
An aircraft motor includes a bearing assembly including a first plurality of rotor alignment magnets; a magnet support structure fixedly mounted on a shaft of the motor in a spaced apart relation to the bearing assembly, the magnet support structure including a second plurality of rotor alignment magnets such that when the vertical thrust engine is disengaged, attraction between the first and second rotor alignment magnets causes the magnet support structure to rotate relative to the bearing assembly to an alignment position defined by the relative placement of north and south poles of the first and second plurality of rotor alignment magnets.