Propellers TRIZ Cases

Counterweight rotors produce net force vectors that inhibit helicopter vibrations, reducing equipment fatigue and occupant wear.

A bar-like member in the shroud bore increases contact area for structural damping.

Adjustable thruster direction enables the aircraft to hover in an inclined orientation, allowing a fixed camera to face any target without entering the view.

A vacuum pump forcibly recovers discharged grease from a wind turbine blade rotating ring bearing, preventing lubricant loss and seal leaks.

A three-stream turbofan engine uses a secondary ducted fan to generate thrust through a core duct.

A centrifugal fan and nozzle system controllably orients exhaust to vector thrust for vertical take-off and landing aircraft propulsion.

A toroidal aft flange with laminar composite structure distributes mechanical loads through its curved geometry.

Real-time temperature feedback controls cooling fluid injection, reducing erosion and windage heating while minimizing consumption.

Rounded vortex generators reduce frictional losses and improve manufacturability for low-pressure turbine applications.

Guided convex blocks convert axial force into circumferential tightening, resolving assembly space constraints in external rotor fans.

Moving slip rings to a clean environment aft of the gearbox eliminates contaminant exposure and brush block friction, reducing maintenance needs.

Redundant hydraulic systems with pressure relief valves manage dynamic loads on wind turbine blades, maintaining efficiency during high-speed flow conditions.

Interchangeable propulsion assemblies enable vertical takeoff and forward flight, resolving runway length constraints.

Hub vane trailing surfaces join plates to expand bladed area, resolving lift efficiency versus manufacturing complexity trade-offs.

PTFE coating lowers ice cohesion to allow centrifugal shedding, eliminating electrical deicing power consumption.

Ball-jointed blade attachments on a variable pitch fan rotor enable differential disk rotation, eliminating bulky bevel gears and reducing moving mass.

A rotor craft design featuring a spar and skin structure where the spar connects to the hub separately from the skin, allowing for reduced torsional stiffness.

A thermal barrier coating embeds metal fibrous reinforcements to strengthen the ceramic layer and prevent spalling.

A variable waist cowl structure adjusts the hub-tip radius ratio between counter-rotating propellers to manage slipstream flow.

Segmented downstream fairings with through-notches reduce thermal stresses at blade-platform junctions without compromising sealing integrity.

Relocating the electric generator drive from the high pressure compressor to the power turbine maintains pumping margins and thermodynamic equilibrium.

A cycloidal rotor blade adjusts pivot points and trailing edge geometry using electro-active polymers to control fluid flow.

A turbine bucket blade root uses three-area curvature to maintain steam passage width.

An asymmetric aft plate maintains cold gas pressure in under-platform cavities to suppress hot gas ingress and reduce blade fatigue.

Pivoting guide vanes in the blower outlet redirect airflow to eliminate recirculation and ensure uniform cooling across heat sinks.

Independent coaxial propellers adjust blade pitch and rotation phase to cancel noise while maintaining lifting force.

Stowable prop blades minimize aerodynamic drag during cruising while maintaining thrust capability during takeoff.

Variable-width flanges extend into the blade tip to reduce material consumption and maintain buckling resistance.

A deformable pylon attachment system adjusts engine position relative to the wing using a trapezoidal connecting mechanism.

Variable pitch propellers compensate for aerodynamic instabilities by balancing vertical and horizontal thrust vectors across flight regimes.

Unsteady pulsed jets modify velocity profiles over curved edges to enhance aerodynamic lift while reducing pressurized air mass flow requirements.

A feedback device embeds magnetically permeable position markers in a non-magnetic body to detect propeller blade pitch.

A steam conduit with a pressure tap measures midspan packing pressure directly during turbine operation.

Auxiliary propulsors ingest boundary layer flows to reduce power requirements and improve propulsion efficiency.

Tail-mounted cross-flow fans replace exposed rotors to reduce noise and profile drag while maintaining anti-torque capability.

A blade lock mechanism transitions rotor degrees of freedom between flight modes using a pivotally connected link and lever assembly.

Shape memory alloy actuators adjust propeller blade pitch via thermal phase changes, eliminating complex mechanical linkages and reducing system weight.

A ceramic matrix composite airfoil assembly uses a reaction barrier coating between the metal alloy attachment and the CMC substrate.

Segmenting the wind turbine hub into transportable modules resolves weight versus strength trade-offs by enabling on-site assembly of high-capacity structures.

Extending position markers beyond feedback device edges increases magnetic flux density, eliminating edge-effect reading errors during blade angle measurement.

Flexible hub portions dynamically adjust blade angles, eliminating stall regions and reducing noise in axial-flow fans.

Foldable propeller blades stow for road safety while deploying for aerial propulsion in a hybrid drive system.

Coupling semi-circular members creates a circular bling assembly that reduces stack-up tolerances and enhances steam turbine efficiency.

Integrated actuator eliminates electric motors to reduce weight and complexity during flight mode transitions.

A marine propeller unit uses a dual driving force transmission system to absorb shift shock and transmit power reliably.

Elastomeric polymeric matrix accommodates interlaminar shear strains during blade flapping, preventing delamination in composite helicopter rotor yokes.

Segmented adhesive strips replace rigid pre-formed extensions, reducing manufacturing costs while maintaining noise reduction across variable blade sizes.

A composite airfoil uses rolled fiberglass fabric to reinforce the leading edge structure.