Propellers TRIZ Cases

A turboprop engine control system modulates propeller speed to maintain constant temperature-corrected rotational speed.

A folding device uses a fitting and cuff with lateral arms to rotate rotor blades around a horizontal axis.

A sleeve absorbs shear loads between a fan and shaft, reducing bolt stress and simplifying manufacturing.

Curved tippet redirects radial flow axially to reduce force losses, while planar front surface eliminates cavitation-prone low-pressure zones.

Differential torque control system detects load imbalances from asymmetric gusts and dynamically adjusts collective pitch to prevent gearbox overload.

Segmenting the leading edge into a deformable carbon fiber skin reduces structural complexity while absorbing foreign object impact energy.

Electrical insulation on the lightning conductor prevents flashovers caused by water accumulation in composite wind turbine blades.

An electromagnetic linear motor/generator integrated into a rotor hub damper harvests energy from lead/lag oscillations.

Bonding a carbon allotrope heater directly to an erosion shield simplifies assembly and reduces aircraft downtime.

Self-articulating turbine blades pivot to match airflow pressure, eliminating complex feedback systems in wave energy converters.

A blade plug fluid communicator enables controlled air passage through a movable cap to manage internal cavity conditions during aircraft manufacturing.

Integrated processing unit consolidates overspeed governor and pitch control functions into a single feather valve mechanism, eliminating redundant hardware.

Independent pitch control units reverse blade angles to idle in a full feather position, reducing aerodynamic loads on horizontal axis wind turbines.

A rotor hub cap with a crenellated aerodynamic profile deflects airflow downward, reducing wake intensity and tail-shake.

A balancing insert within a variable pitch airfoil assembly reduces vibration stresses by counteracting unbalanced forces across the full range of motion.

A dual drive hybrid electric power plant combines an internal combustion engine and an electric motor to drive aircraft propulsion assemblies.

A controller coordinates electric motor and gas turbine engine torques to manage hybrid-electric aircraft propulsor rotation speed.

A compressible door header resists fuselage stress gaps by laterally moving and upwardly biasing against the headliner.

Segmenting the blade into ceramic and metallic portions simplifies manufacturing of complex dovetails while maintaining high-temperature performance.

A wind turbine blade root attachment employs a non-uniform cross section wall panel to increase the second moment of inertia and reduce material usage.

Segmented feedback device determines axial position via voltage ratios, resolving measurement precision limits in featherable propeller systems.

Arcuate balance weight projection engages rotor flange apertures for secure attachment.

Integrated coil placement reduces assembly length to improve vibration resistance and simplify rigging.

Dynamic heater control raises activation thresholds at low ambient temperatures to prevent severe cooling and reduce mechanical stress from thermal gradients.

A fan blade uses passive and active parts driven by main airflow pressure to rotate without a motor.

High aspect ratio spokes replace shear-loaded stators with axial tension members and damping treatments to suppress acoustic noise in ducted fan assemblies.

Axially movable control body drives stator vane pitch via connection annulus and levers, reducing mass and bulk.

A wind turbine blade lightning down conductor uses a high-resistance parasitic layer to reduce electrical fields during strikes.

A turbine blade shroud segment features a central indentation along its engaging face to split contact areas and increase frequency stability.

A segmented wind turbine rotor blade uses a rigid spar member to align and connect individual segments end-to-end for structural rigidity.

Strain gauges on the rotating shaft separate true thrust from non-thrust contributors like 1P moments.

A tilt-wing aircraft design directs rotor airflow over the wing to enable efficient vertical takeoff and forward flight transition.

An additively manufactured counterweight integrates a weighted element and arm into a single piece.

A segmented propeller design uses flexible tensile materials to fold blades into a compact stowed configuration.

Alternating diameter segments distribute pressing stress to prevent hub breakage while pockets enable condensation runoff and cooling.

A rotor blade tip rake angle reduces radial loading during tip rubs.

Segmented mounting holes anchor handling means to wind turbine blades, reducing system complexity and surface damage during transport.

A spring-loaded wedge spacer applies radial preload to turbine blade dovetails, preventing unseating under high vibratory loads and asymmetric propeller forces.

Stamping a single low carbon steel sheet eliminates welding steps, reducing manufacturing complexity and cost while maintaining structural strength.

Movable fairing members guide airflow to reduce turbulence and vibrations, resolving stability trade-offs in side winds.

Inertia welding joins cast metal blade rings to hub structures using rotational friction heat, eliminating expensive vacuum furnace requirements.

A swash plate and pitch link assembly transitions rotor blades between extended and folded positions to enable airplane mode flight.

A turbine flyweight and cam follower system positions blades at coarse pitch angles during low RPM startup phases to generate higher torque.

Centrifugal weights on slides move a collective pitch shaft against spring resistance, automating blade angle adjustments across flight phases.

A kinetic energy taxi system uses a flywheel and free power turbine to harvest exhaust energy for ground propulsion.

Segmenting the rotor array into independent units maintains flight balance after failures while periodic action patterns reduce noise and vibration.

Three-dimensional woven composite blades use metallic inserts at the root to withstand intense aerodynamic forces and vibrations.

A retractable driveshaft assembly uses friction plates to selectively engage a mid-wing gearbox.