VTOL Stabilization Structures for Ground-Effect Turbulence

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Solution Overview

Problem

The widespread adoption of vertical takeoff and landing (VTOL) aircraft is hindered by issues such as noise, air turbulence, safety concerns, and structural damage during takeoff and landing, particularly in inhabited areas, due to rotor-generated ground effect and instability.

Innovation Solution

The use of vertically-oriented support elements with cooperating stabilizer elements and enclosures that stabilize VTOLs during takeoff and landing, minimizing air turbulence and maintaining vehicle stability through engagement with the VTOL's rotor guards and standoffs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If vertical takeoff and landing vehicles are used for point-to-point delivery, then space requirement for takeoff and landing is reduced, but air turbulence and noise increase

Engineering Contradiction:

Improvetakeoff and landing spaceVSAvoidair turbulence and noise

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a stabilizer element as an intermediary component that engages with the VTOL during takeoff and landing. This stabilizer element acts as a mediator between the vehicle and the ground effect turbulence, providing stabilization while allowing the VTOL to operate in confined spaces. The stabilizer element captures and dissipates the harmful turbulence energy before it affects the vehicle.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful ground effect turbulence into a beneficial stabilizing force. By positioning the stabilizer element to engage with the turbulent airflow generated by the VTOL rotors, the system transforms the previously harmful turbulence into a controlled force that enhances vehicle stability during takeoff and landing operations in confined areas.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Adaptability or versatility

If VTOLs operate in inhabited areas, then delivery service accessibility improves, but safety issues and structural damage risk increase

Engineering Contradiction:

Improveservice accessibilityVSAvoidsafety and structural integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The stabilizer element is deployed and engaged with the VTOL before the vehicle encounters dangerous turbulence conditions during takeoff and landing. This preliminary stabilization action prevents structural damage before it occurs, allowing VTOLs to safely operate in inhabited areas without compromising structural integrity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The stabilizer element provides beforehand cushioning by absorbing and dissipating the impact forces of ground effect turbulence before these forces can damage the VTOL or surrounding structures. This cushioning effect protects both the vehicle and nearby buildings during critical takeoff and landing phases in urban environments.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of operation

If VTOLs perform vertical lift-off and descent, then runway requirement is eliminated, but vehicle instability due to ground effect turbulence occurs

Engineering Contradiction:

Improverunway-free operationVSAvoidvehicle stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The stabilizer element serves as a mediator between the VTOL and the unstable ground effect turbulence. It engages with the turbulent airflow and provides a stabilizing influence on the vehicle, allowing vertical takeoff and landing operations without runways while maintaining vehicle stability throughout the maneuver.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The stabilizer element changes the aerodynamic parameters of the airflow around the VTOL during takeoff and landing. By modifying the flow characteristics and reducing the intensity of ground effect turbulence, the system enables stable vertical operations without requiring traditional runway infrastructure.

Inventive Principle:

Principle #35Parameter changes

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 solution significantly reduces air turbulence and enhances the safety and stability of VTOL operations, allowing for smoother takeoffs and landings, even in populated areas, by managing airflow and maintaining vehicle control.

Implementation Method 1

rotor-generated ground effect and instability

Methodology Applied

Scientific EffectGround effect: Ground Effect

Implementation Method 2

create significant air turbulence

Methodology Applied

Scientific EffectAir turbulence: Turbulence

Data Source

PatentUS12420962B2Vertical air vehicle takeoff and landing stabilization apparatuses, systems, and methods

Publication Date: 2025.09.23 THE BOEING CO

AI summary

Vertical takeoff and landing vehicles (VTOLs) of the type used for the point-to-point delivery and transport of payloads (e.g., packages, equipment, etc.) and personnel, are significantly stabilized at least during takeoff and landing with present aspects significantly ameliorating or significantly eliminating destabilizing effects, including ground effect, during VTOL takeoff and/or landing.