Propellers TRIZ Cases

Cowl pivoting motion separates joint edges radially to eliminate blockages during maintenance, reducing aircraft immobilization time.

A vortex generator base features a recessed inner side to house adhesive strips for direct blade mounting.

Defining the airfoil with discrete X, Y, Z coordinates resolves manufacturing precision trade-offs while maintaining thermal and mechanical performance.

Imbalance mass rotors generate counteracting force vectors to cancel helicopter vibration frequencies.

Airfoil rim foil houses the rotor blade to reduce forward flight drag, resolving the trade-off between obstacle protection and aerodynamic efficiency.

A convertible ducted fan engine transitions between fluid-propulsion and drive-wheel configurations using a linear drive motor.

Software feedback control balances torque between rotors, eliminating mechanical complexity and stabilizing toy helicopter flight.

Predetermined cooling hole coordinates optimize thermal management while reducing manufacturing complexity in high-pressure turbine components.

A VTOL tilt-wing aircraft uses a tilting wing mechanism to achieve jet-like speed without requiring long runways.

A rotating airfoil assembly tilts its rotation axis to align with incoming airflow.

A helicopter rotor hub integrates elastic damping devices between blades and the hub structure to control vibration.

Segmented hub ribs secure wet equilibrium clay against centrifugal forces, eliminating desiccation delays and ensuring immediate rotor stability.

Segmented blades with distinct angles reduce energy consumption while maintaining consistent pumping performance across varying tank diameter ratios.

Radially offset lobes in the fir-tree root increase the cross-sectional area, reducing shear stress and vibrational loads on gas turbine rotors.

Traction arms connect the actuator to a synchronization ring, eliminating heavy radial shafts and reducing air stream obstruction.

Nested foam cores with reinforcing fibers dissipate impact energy to prevent structural breakup while minimizing added weight.

Centrifugal force drives the damping element against the blade platform, optimizing contact geometry to reduce wear on force transmitting surfaces.

Adhesive bonding between tapered boxes eliminates complex metallic fasteners, reducing assembly cost and risk for long wind turbine blades.

Pressure-sensing check valve isolates the coarse chamber during hydraulic line pressure loss to prevent undesirable pitch drift in contra-rotating systems.

A rotor wing design uses continuous fibre layers extending through the tension-torque-transmission element to create a self-supporting shell structure.

Radial webs on the sun gear shaft absorb operational distortions, reducing planet gear wear and eliminating splined connections.

Offset screw assemblies distribute tangential loads across passageways, reducing stress concentrations at the radial summit to extend service life.

Nesting a first blade section inside a second section with conformable spacers reduces storage volume while preventing surface wear during transit.

A tapered groove in the rotor blade neck redirects stress concentrations deeper into the body, extending lifespan while maintaining load-bearing capacity.

Rotating wings on a flying frame eliminate runway requirements by switching from lift generation to thrust production during vertical takeoff.

Homogeneous composite construction controls vibrational characteristics and resonance frequencies by eliminating separate tungsten weights.

Preforming metal staples as weft threads during weaving eliminates complex deformation tooling, enabling larger turbine blade reinforcements.

Fan blades with tip camber and forward sweep improve thrust while maintaining airflow stability.

Shroud airflow openings pass air through a rim structure to reduce specific noise frequencies and lower sound pressure levels in automotive cooling systems.

Variable leading edge sweep angles reduce hub incidence swings to improve compressor stall margin without sacrificing efficiency.

A dual-mode wind machine mixes air to prevent frost damage while generating electricity through a reversible motor-generator unit.

A cover plate and retention member seal the gap between a bucket dovetail and rotor wheel.

Mechanical radiator valve exchanges heat between temperature control systems to prevent fluid clogging from viscosity increases at low temperatures.

Staggered attachment niches enable dual-side mounting, eliminating different housings and simplifying maintenance.

Ovoid radial housings compensate for centrifugal and axial loads, preventing bearing ring ovalization and extending component lifespan.

Segmented spar beams connect via overlapping shear webs to reduce transportation costs while maintaining structural integrity.

A spherical yoke mechanism adjusts propeller blade pitch to counteract sinusoidal thrust variations.

Composite coating resolves sand erosion versus adhesion trade-off, improving durability in extreme environments.

Sensors detect blade deflection and feed data to a flight control computer that adjusts active blade tips to prevent collisions with the duct.

Two-level blade units on a centrifugal fan hub create bidirectional flow passages that enhance air guiding efficiency while reducing operational noise.

Elastomeric rollers engage ramp surfaces to constrain blade pitching, eliminating aeroelastic instability and enabling higher cruising speeds.

Partial root cuts enable removal of damaged blades from blisks, avoiding costly full rotor replacement and reducing turbomachinery repair downtime.

A titanium inner sheath bonded to a nickel outer layer forms an airfoil assembly that absorbs impact energy while resisting surface erosion.

An annular air bleed orifice in the fan rotor cone uses radial blades to drive airflow into a cooling channel, reducing pressure losses in the primary duct.

A propeller blade angle control circuit directs hydraulic fluid through a valve system to manage pitch change mechanism actuation.

A toroidal propeller design merges blade tips to form a closed structure that enhances stiffness and reduces acoustic signature.

Stationary blade orientation device eliminates rotating joints to prevent premature wear and fluid coking in turboprop engines.

Inverted epicyclic gear stages with stationary carriers allow static mounting of pitch control and monitoring equipment, eliminating heavy slip rings.

A propeller system adjusts blade tip positions to maintain optimal clearance within the duct enclosure.