Propellers TRIZ Cases

Moving the hydraulic transfer bearing to the gearbox front end reduces nacelle housing weight and volume while improving maintenance accessibility.

Segmented passages delay surge by relocating mixing downstream, widening the operating envelope for turbocharged engines.

A turbine bucket tip shroud edge profile defined by specific Cartesian coordinates to cover the airfoil while minimizing operational stresses.

Coaxial tractor and pusher tiltrotors reduce manufacturing complexity and vibration while enhancing door access and control stability.

Variable hub length and distinct blade geometries optimize exhaust gas interaction to balance acceleration and top speed.

A fusible screw with a rotation-blocking portion prevents torsional torque transmission during tightening.

Dynamic rotor orientation reduces fuel consumption and pollution while maintaining safe vertical takeoff capabilities.

A riblet sheet with a peelable liner layer attaches to airfoils while preserving surface microstructures.

Cavity inlets covered by porous material attenuate turbofan noise while preserving aerodynamic thrust generation.

A bonded support ring connects to a gas turbine spinner section, resolving injection molding lock-on conditions while maintaining structural integrity.

Inclined rotation axes enable crossed overlap of folded arms, reducing overall size while maintaining reliability.

A hybrid yoke design combines a metal center with composite flexure arms to manage rotorcraft centrifugal loads.

Variable pitch blades adjust turbine shaft speed to generate AC electricity frequency, eliminating complex power electronics and reducing system weight.

Unidirectional fibre spar tapes align with centrifugal forces to absorb loads in fenestron rotor blades.

Segmented ring receptacles match blade platforms to resolve mounting difficulty and ensure leak-tightness.

A wind turbine controller adjusts blade pitch and rotor speed to minimize acoustic emissions while maintaining power extraction.

Local thickening on a blade divider contracts flow passages to accelerate cooling fluid, reducing pressure loss and improving film cooling efficiency.

A boundary layer ingestion fan employs a negative hub angle to prevent flow separation and reduce wake dissipation losses.

A ceiling fan swing structure uses a reduction motor to control motion velocity independently of the main fan rotation.

Metallic foam spar cores replace conventional foam in propeller blades to improve structural bonding with surrounding layers.

Segmented impeller blades eliminate reflux interference, boosting airflow efficiency without structural rings.

Centrifugal mass member moves along a channel to pressurize damper fluid, controlling troublesome rotary blade motion.

Segmented hub rings with keys and lock pins secure impellers to a shaft, enabling quick removal through small vessel openings for sanitary cleaning.

Non-linear grooves with acute angled sidewalls mechanically interlock fibers without binders, eliminating contamination risks during hot isostatic pressing.

Integrating splitters into a diffuser duct reduces flow separation and surface friction losses, enhancing hover efficiency without increasing device size.

A chordwise folding and locking mechanism secures rotor blades in a stowed orientation to reduce aircraft storage footprint.

A single actuator system synchronizes variable geometry equipment across multiple gas turbine engine bodies to consolidate control functions.

A motion generating system propels a craft by introducing hot fluid to create dynamic pressure reduction zones.

A propeller control unit bypass line reroutes oil flow around blocked drain paths to maintain actuator pressure.

A drone duct integrates a microphone and speaker to generate antiphase sound signals for active noise reduction.

A rotorcraft pitch attitude control system adjusts acceleration profiles during takeoff based on elapsed time and engine operating state.

Stator grooves and rotor fingers create tortuous paths that reduce hot air leakage and minimize cooling air usage in gas turbine engines.

Opposing tangential forces from the rack and pinion minimize net axial force on the engine structure while rotating fan blades.

Segmented hub ribs create dedicated heat-dissipating passages that discharge hot air while preventing external particle entry into the rotor.

Segmented internal limbs direct cooling air through impingement passages to enhance heat transfer at the trailing edge.

Offset bulkheads in a double-walled seal reduce stress peaks at the blade root, extending component lifetime and simplifying assembly.

A hinged connection apparatus uses extendable hinge pins to secure wind turbine blade components.

A ceiling fan blade iron mounting system uses a segmented balancing ring to enable radial and pivotal movement of blade irons.

A radial turbine integrated into the propeller hub generates additional thrust and power from the propulsion flow.

Segmented embedded heaters apply localized high watt density at the leading edge to prevent ice formation while reducing total power consumption.

Segmented runner blades replace worn components without flow path adjustments.

A ducted fan shroud uses a multilayer composite structure to capture blade fragments during impact events.

External supply circuit transports extracted compressor air to turbine buckets, reducing parasitic airflow consumption while maintaining thermal control.

Left-handed fasteners counteract rotor vibration unscrewing to maintain bearing attachment integrity.

Locking peg mechanically secures blades in feathered position to eliminate heavy counterweights.

Optimized curvature ratios on the forward housing reduce wave drag and frictional drag, enabling high subsonic cruise speeds above Mach 0.72.

A hybrid composite cladding protects helicopter rotor blades using ceramic and polymer layers.

A control system detects icing potential by comparing measured wind speed with calculated estimates using existing anemometers.

Flexible rotor blades coil around a common axis via relative rotation of rotating members to adjust pitch and shape.