Propellers TRIZ Cases

Static back-up featherers apply loads via hydraulic actuators to rotate propellers, bypassing slip rings that cause reliability issues.

A multi-stage compressor valve selectively routes extraction air to turbine ports based on operating conditions.

A brushless DC motor controller applies transient and static voltages to stator windings, generating torque and AC power directly on the rotating rotor.

Tilting wing aircraft uses a tail motor as a generator to recharge batteries, extending flight duration while reducing aerodynamic drag.

Mobile counterweights displace along guiding slots to balance coaxial contra-rotating propellers, reducing additional mass and mechanical vibrations.

A composite axial retention device with viscoelastic damping reduces blade vibration amplitude and prevents premature wear.

Wedge assembly with fixed bearing surfaces adjusts clamping force via screw rotation, mitigating vibratory excitation and flapping in wide-chord fan blades.

Axial projections join impellers into a rotating cluster assembly that balances pressure vectors to reduce axial loads on drive motor bearings.

Blade-integrated slides constrain inter-blade platform radial movement, eliminating complex retention systems and reducing fabrication costs.

Bonding grid with adhesive distribution openings ensures uniform application between wind turbine blade segments.

Segmented inner and outer rotors tilt to expand wing span, resolving storage volume constraints without sacrificing flight stability.

Inter-sector damping members dissipate vibrational energy through friction, reducing wear on the external ring sectors.

Machined track adjustment indicators on a pitch link tube allow technicians to measure pitch length changes visually, reducing vibration and maintenance costs.

A differential pitch link assembly adjusts upper and lower rotor blade angles independently to optimize lift and thrust across flight modes.

Aircraft flight control system manages distributed thrust array rotor speed and vector angles for stable orientation transitions.

An electric motor drives the variable lift body pivot, reducing mechanical weight and aerodynamic drag during mode transitions.

Annular axial retention plate uses dual circumferential interlocks to secure fan blades in a rotor disk.

Counterweights on hub envelopes correct radial and axial unbalances, reducing mechanical vibrations caused by aerodynamic forces during flight.

Fractal surface textures modify airfoil geometry to reduce fluid drag, resolving turbulence issues inherent in Euclidean designs.

Curved tooth coupling links compressor and turbine wheels via a tie bolt, accommodating thermal expansion and centrifugal growth to maintain rotor alignment.

Increasing propeller tip speed by 20% with variable pitch angles minimizes wake interaction noise while managing aerodynamic loads.

Three-dimensional woven fiber reinforcement in the composite structure withstands intense aerodynamic forces while minimizing mass.

Add fillets and conic cuts to repair cracked gas turbine rotor disks, extending life and reducing scrapping costs.

A cyclic swashplate drive arm connects to a rotary swashplate via annular linear connection means for predictable movement.

Unified layup creates a ceramic matrix composite blade with an integral platform, preventing disengagement and ensuring reliable sealing.

An in-hub generator replaces wear-prone slip-rings with electromagnetic induction, using a gear assembly to decouple hub speed from optimal generator rotation.

A single blade rotor with a counterweight generates vertical lift, reducing mechanical complexity and improving safety during VTOL flight transitions.

Actuated movable spinner fairing members retract to minimize storage volume while maintaining optimal aerodynamic drag profiles.

Parachute system provides lift and thrust for versatile aircraft flight modes.

Radial sliding guides allow rack movement that maintains tooth meshing accuracy under centrifugal and thermal expansion forces.

Wing openings house internal thrusters to provide vertical lift, resolving airport dependency bottlenecks in fixed-wing transport.

Compound curve fillets reduce stress concentration at airfoil roots while maintaining gaspath flow performance.

Aligning the hub axis with the cone generator line directs fluid flow axially, reducing turbulence and increasing propulsion efficiency.

Narrowing air gaps between vanes and housing prevent reverse flow, reducing turbulence and wind shear noise in the blower fan.

Series of counter-rotating propellers generate thrust via vacuum effects, replacing heavy gas turbines with lighter electric components.

An intermediary connecting rod strengthens the shaft-pipe joint while a displacement-correspondence tool detects rocking motions to stop the motor.

Varying rear shroud thickness relative to the front shroud resolves high-cycle fatigue deterioration while accommodating balance piston recesses.

Tubercle leading edges on turbine rotor blades enhance lift and reduce drag through modified flow separation.

Folding hover propellers stow during cruise to reduce drag, resolving the trade-off between vertical takeoff capability and forward flight efficiency.

Embedded capillaries transfer heat to composite turbine surfaces, reducing ice formation and engine efficiency penalties from low thermal conductivity.

Foldable dihedral wing extensions retract against a pylon to reduce spatial footprint while maintaining cruise efficiency in tiltrotor aircraft.

Segmented concentric rotors operate at independent speeds to keep blade tips below sonic limits, reducing noise while maintaining thrust power.

A lock plunger mechanism secures a ram air turbine housing to eliminate axial free play during stowed operation.

A ceiling fan blade uses a press board and stop member to achieve stable quick assembly on the frame.

Segmented impingement cooling plates create localized thermal buffers that reduce turbine vane temperatures while minimizing axial spacing risks.

Phase-locking multiple propellers at a predefined offset creates destructive interference that reduces tonal noise while maintaining thrust output.

Unitary flexible bellows seal maintains constant engagement with moveable pitch joint portions to protect bearings from contaminants and extend service life.