Flywheel Adapter Assembly for Gyroplane Engine-Gearbox Vibration

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Solution Overview

Problem

Existing 2-cylinder, 4-stroke engines, such as those used in utility vehicles, are not compatible with traditional gearboxes for gyroplanes due to vibration and oscillation issues, and traditional flywheels are too small to accommodate these engines, leading to failure and damage.

Innovation Solution

A specially designed large-diameter flywheel with a separate adapter casing is used to connect the engine and gearbox, incorporating a flywheel hub to dampen vibrations and balance moments of inertia, along with a reinforced casing to handle thrust loads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a 2-cylinder, 4-stroke engine is directly connected to a traditional gearbox, then the engine structure is simple and compact, but the engine fails due to aggressive knocking and vibration

Engineering Contradiction:

Improveengine-gearbox connection structureVSAvoidengine operation reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

A flywheel adapter is introduced as an intermediary component between the engine and gearbox. The adapter includes a flywheel with specific moment of inertia that acts as a mediator to smooth out vibrations and knocking forces, allowing the engine to operate reliably while maintaining the simple direct connection structure

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If a traditional small flywheel is used with the engine-gearbox system, then the device remains compact, but it cannot dampen the vibration or balance the moments of inertia

Engineering Contradiction:

Improveflywheel sizeVSAvoidvibration and oscillation

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The moment of inertia parameter of the flywheel is specifically changed and optimized. The flywheel adapter incorporates a flywheel with a moment of inertia selected to balance the oscillating moments of inertia generated by the engine, thereby dampening vibrations while maintaining a compact overall size

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If a large-diameter flywheel is used to dampen vibrations, then vibration is reduced, but the flywheel cannot be accommodated within traditional engine and gearbox configurations

Engineering Contradiction:

Improvevibration dampeningVSAvoidadapter configuration

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The flywheel system is segmented into a separate adapter assembly that can be independently configured. The flywheel adapter is designed as a distinct module with the large-diameter flywheel, which can be attached to the engine output without interfering with the gearbox internal components, thus accommodating the large flywheel while managing system complexity

Inventive Principle:

Principle #1Segmentation

4Power

If the adapter is positioned between the gearbox and engine, then rotational forces are accommodated, but the adapter casing must handle approximately 400 pounds of thrust load from the spinning propeller

Engineering Contradiction:

Improverotational force transmissionVSAvoidadapter casing strength

Core Design Contradiction:

PowerVSStrength

Solution Approach 1:

The flywheel serves as a counterweight that not only balances oscillating moments but also helps manage the thrust loads. The flywheel's mass and positioning in the adapter create counterbalancing forces that reduce the net thrust load on the adapter casing, allowing it to handle the approximately 400 pounds of thrust from the propeller

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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 allows efficient operation of 2-cylinder, 4-stroke engines in gyroplanes by balancing moments of inertia and managing thrust loads, enabling smooth power transfer to the propeller.

Implementation Method 1

utilizing a specially designed flywheel of large mass and inertia (having large diameter) to dampen the forces (or balance moments of inertia) internal to the engine and the reduction gearbox

Methodology Applied

Scientific EffectMoment of inertia: Moment of Inertia

Implementation Method 2

to dampen the forces (or balance moments of inertia) internal to the engine and the reduction gearbox and allow for efficient driving of the gearbox without harm to the engine

Methodology Applied

Scientific EffectVibration damping: Damping

Implementation Method 3

The casing of the adapter is configured such that the thrust load is transferred around the flywheel to the engine block

Methodology Applied

Scientific EffectForce transfer: Force

Data Source

PatentUS20260021899A1Devices, systems, aircraft and methods for powering the same

Publication Date: 2026.01.22 COVELLI JOSEPH

AI summary

Devices, systems, and methods for powering an output drive of a gearbox, including in some applications powering a propeller of a gyroplane, including a flywheel hub connected to a flywheel, connected to a drive shaft of an engine, and connected to a rubber coupling of a gearbox to drive an output shaft of the gearbox such that activation of the engine powers a propeller driven by the output shaft, and in aspects includes an adapter having a flywheel contained in a casing which casing is connected to the engine at one side of the casing and to the gearbox at an opposite side of the casing. In aspects the system accommodates use of a 2-cylinder, 4-stroke engine to power a gyroplane, lightweight aircraft, airboat, or other machinery.