Propellers TRIZ Cases

Non-uniform blade spacing breaks the periodic symmetry of wake and bow waves, reducing resonance and structural damage in rotary machines.

Segmented cooling zones apply tortuous paths at the trailing edge and pedestals at the leading edge to resolve pressure drop versus heat transfer trade-offs.

A composite turbine blade integrates a cylindrical root attachment with a braided carbon fibre spar to withstand broadband vibratory stresses.

A control system adjusts rotor blade surfaces to reduce vibration by modifying lift and drag forces.

Replacing the swashplate with electric actuators reduces rotor weight and drag while eliminating ballistic vulnerability.

Elastic posts enable manual blade detachment from the hub structure, eliminating economic waste from non-disassemblable configurations.

A variable ratio bellcrank mechanism adjusts manual flight control gain by varying slider positions within the linkage assembly.

Pivoting legs transition a drone between walking and flight, resolving terrain adaptability versus speed trade-offs.

Removable front inlet liners provide direct access to internal fan seals within a modular ducted propulsor system.

Vertical flow guides balance pressure between spaced upper and lower courses, reducing spanwise fluid flow and induced drag from wing tip vortices.

Segmenting the airfoil from the platform reduces manufacturing complexity while maintaining high temperature resistance through thermal expansion compliance.

Independent opposed tilting blades use counterweights to minimize mechanical complexity and maximize productivity in vertical axis wind turbines.

A tip profile with a reducing slope minimizes high unsteady pressure near the airfoil leading edge.

A morphable composite structure uses conductive particles to heat structural fibers and alter its shape dynamically.

Segmenting fladed blades into distinct inner and outer portions with different stagger angles equalizes counter-rotating fan rotor torque without stator vanes.

A propeller assembly uses a coupling shaft to pivot stacked blades between stowed and deployed configurations.

Multi-element propeller blade deicer segments heating zones to balance three-phase electrical loads, reducing peak power demand and vibration.

Extended radial chimneys enable pressurization tubes to slide into sealing end plates, preventing damage during assembly of small diameter turbomachines.

Hydraulic actuators retract downstream propeller blades to cut takeoff noise without sacrificing cruise thrust or increasing fuel consumption.

An eccentric inlet cone tip amplifies centrifugal forces to rapidly detach ice accretions from rotating aircraft turbine engines.

Acoustic resonators emit additional tones forming musical intervals with propeller drone noise, reducing environmental disturbance while maintaining thrust.

Offsetting spinner blades forward of main blades increases overall pressure ratio while reducing fan diameter and booster stage count.

Sigmoid propeller blades with opposing concave faces reduce cavitation and engine load by optimizing pressure distribution.

A blade root bearing uses a threaded retention body to secure the distal sealing system against centrifugal forces.

Recesses on turbine vanes provide controlled leakage flow to prevent excessive pressures during engine braking and exhaust gas heating modes.

Segmented stabilizers use aerodynamic shadow to reduce attitude hump and pilot workload.

A wind turbine heat transfer system circulates a medium to move thermal energy between components.

A deicing device captures thermal energy from turbomachine exhaust gases and distributes it to propfan blades using hot air ejectors.

Vertical axis helix turbine design reduces draft tube volume and construction costs by managing kinetic energy recovery at very low heads.

Nested tip shelf holes and radial wall openings direct cooling air to mix with combustion gases, reducing thermal fatigue while maintaining engine efficiency.

Segmented annular discs with radial vanes generate positive pressure to expel fluids, achieving IP-55 protection without complex labyrinth seals.

A cooling device for turbomachine rotor disks uses segmented flanges to channel air into slots.

Segmented polymer sheath covers paint steps and leading edges to maintain laminar flow without mechanical fasteners.

A boundary layer ingestion fan reverses rotation direction and adjusts blade pitch to generate reverse thrust.

Varying radius compound fillets reduce thermal stress at suction side high C points, improving aerodynamic performance and castability.

A rotor shrouding design encapsulates a primary load-carrying structure within a stiffening secondary layer made of inflexible lightweight materials.

Aircraft wing pivots between M-wing and gull configurations to manage thrust vectoring and aerodynamic lift across flight modes.

Increased inner profile thickness minimizes boundary layer separation near the hub, boosting power output at low wind speeds.

A contoured third stage turbine airfoil uses Cartesian coordinate-defined surfaces to optimize aerodynamic flow paths.

Mounting pivotable engines at leading and trailing edges resolves hovering balance risks from engine failure while reducing structural complexity.

A composite inlet guide vane uses fiberglass epoxy cores with carbon fabric reinforcement to deliver high static strength and fatigue resistance.

A rotor hub bearing arrangement handles bending moments up to millions of foot-pounds while minimizing weight.

A turbine wheel positions rotor blades to support scalloping surfaces symmetrically, distributing centrifugal forces evenly across the hub junction.

Blade-mounted light sources and fuselage receptors track tip trajectory in real time, enabling proactive maintenance scheduling without grounding aircraft.

Deformable aircraft propeller blades prevent stalls by adapting geometry to varying airflow conditions.

A wind vane damping assembly uses a Halbach array to induce eddy currents, resolving oscillation accuracy trade-offs in varying wind speeds.

Mounting a wind turbine on a building corner with conical blade rotation captures wind energy while clearing structural edges to prevent collisions.

A caret-shaped inner core supports adhered upper and lower skins to form a sandwich structure that improves torsional stiffness in rotor blade trailing edges.

A hybrid propeller hub uses dry bearings and composite materials to reduce weight while maintaining pitch control.