Propellers TRIZ Cases

A blade channel end wall contour with asymmetric recesses and elevations modifies the static pressure field to control fluid flow patterns.

Calculating limitation flight control positions prevents overrunning operation limitations during rapid pilot inputs.

A propeller nut integrates elastomeric materials to absorb vibration and heat while enabling manual installation without external tools.

A rotor-wing assembly uses a reinforcing member engaged with a locking member to secure the propeller to the motor rotating portion.

Segmented abutments provide geometric failsafe retention for aircraft turbine propeller vanes, preventing detachment without adding mass.

A propeller blade root secured by a safety pin passing through the bowl bottom wall to ensure axial retention.

Replacing propellers with pneumatic discharge through wing panels reduces operating noise while maintaining flight performance.

A cyclic pitch mechanism adjusts blade phase to minimize noise at ground points.

A compartmentalized rotor blade spar uses nested boxes with unidirectional fiber retention belts to absorb centrifugal and torsional loads.

Layered flat fibre layers in a composite transmission element resolve the strength versus weight contradiction while improving torsional rigidity.

Asymmetric root openings increase lead-lag pivoting stiffness and simplify folding mechanisms.

A wind turbine rotor blade noise reducer uses variable stiffness features to flex during wind flow interaction.

Variable pitch fan blades pivot to redirect airflow, eliminating bulky thrust reversal mechanisms and reducing landing brake wear.

Reverse thrust cups on marine propeller blades redirect water flow during reverse rotation, minimizing cavitation at the trailing face to reduce vibration.

A propeller fan design limits the radius ratio of blade portions to 0.4 or less.

Rotating locking parts engage a position limiting catch to prevent blade ejection during acceleration while enabling easy disassembly for transport.

Centrifugal force deploys a movable retaining mechanism inside the blade base to lock the component in place, preventing uncoupling after foreign object impact.

A propeller brush block integrates a visual wear indicator that extends beyond the insert face when brushes degrade, preventing sudden power transfer failure.

Optimized airfoil geometry with integrated cover seal enhances aerodynamic performance and stiffness in high-speed steam turbine blades.

A high pressure turbine vane airfoil profile defined by specific Cartesian coordinates to equalize static pressure gradients.

An anisotropic composite strip inside a rotor blade outer covering twists under centrifugal forces to enable adaptive pitch variation.

A shape-memory polymer sleeve conforms to airfoil surfaces through elastic compression, creating a seamless protective barrier without adhesives.

Dual fuselage-mounted engines drive a rotatable wing via cross-wing driveshafts, resolving engine redundancy and maintenance access constraints.

A ball screw mechanism translates rotational motion into linear actuation for precise rotor blade pitch control.

A porous metallic coating protects composite aircraft skins while allowing moisture diffusion through controlled porosity.

Retractable closure means fill the gap between variable-pitch vane bases and the hub to streamline airflow.

Spinner pressure points detect wind direction upstream of rotor blades, eliminating turbulence-induced yaw errors and optimizing energy output.

Gear-driven timing rings vary fan blade pitch while flexible tennons balance centrifugal forces, reducing rotor weight and improving fuel efficiency.

A hydraulic device uses two drainage ducts oriented in different directions to evacuate internal fluid leaks by gravity.

A direct drive aft fan engine configuration utilizes boundary layer air for enhanced thrust production.

A pre-swirler induces swirl in ambient air to enhance delivery to turbine blade cooling channels, reducing pressure loss and aerodynamic drag.

Asymmetric blade surfaces generate lift and resistance forces, enabling vertical axis windmills to rotate efficiently regardless of wind direction.

A planetary gear train balances torque between contra-rotating propellers, reducing acoustic levels and mechanical stress.

A kinetic energy absorption device uses a compactable core and stiffening members to dissipate impact loads.

Tuned MCrAlM' bondcoats reduce thermal expansion mismatch to limit interface stress and prevent crack formation in thermal barrier coatings.

A rotor-driven fan directs airflow onto a controllable aft rudder to generate side force for directional control.

A collapsible propeller mechanism folds blades parallel to the drive shaft and encases them within a shielding shell to streamline the vessel hull.

Merged fastening components reduce radial footprint while maintaining secure attachment to prevent blade ejection.

Segmented contra-rotating fans cancel acoustic signatures to reduce noise without increasing integration complexity.

Varying axial width along the blade span minimizes profile and secondary flow losses, enhancing turbine efficiency.

Angled locking surfaces wedge end supports into lateral recesses, preventing spacer disassembly under centrifugal forces.

Epicyclic mechanisms transmit motion from stationary actuators to rotating blade supports, reducing control system weight and maintenance complexity.

Blending radii into flat areas on turbine wheels reduces stress concentrations and crack propagation by smoothing thermal and centrifugal loads.

Segmented rotating blade flow paths accelerate fluid through decreasing cross-sections to boost rotational speed and mechanical energy generation.

A turbine bucket platform features a dedicated aft passage linked to cooling circuits for targeted thermal management.

Laser Doppler Anemometers measure leading edge airflow velocity without protruding sensors, eliminating mechanical obstruction and lightning strike risks.

An integrated dual-channel controller merges separate engine and propeller management into one system, reducing complexity while maintaining safety.

Time-division multiplexing distinguishes identical fibre Bragg grating sensors by signal arrival time.

Segmented shear web components with retaining structures achieve precise bond dimensions, eliminating air voids and blade rattling.

Segmented pin with transverse slot reduces stress transfer between turbine blade walls, minimizing fatigue from cyclic thermal loads.