Propellers TRIZ Cases

Independent articulating blades on a vertical axis capture wind energy while feathering to reduce drag.

Morphing airfoil section extends chord length during rotation to prevent retreating blade stall at high altitudes.

Coaxial contra-rotating propellers enable stable vertical and horizontal flight transitions in unmanned aerial vehicles.

Dielectric elastomer actuators replace mechanical linkages to adjust control surfaces without disrupting airflow.

A pump forces air through a heat exchanger to reject waste thermal energy, preventing ice formation on the nose cone at idle conditions.

A variable pitch propulsor system uses a follower-style ballscrew to track actuator stroke and lock blade angles.

Integrated nose cone and fan blade structure routes airflow via blade passages to reduce device complexity while cooling high-temperature fluids.

Specific front edge, mounting, and twisted blade angles reduce noise while maintaining high air volume and static pressure for electronic cooling.

Local reinforcement at the trailing edge enhances buckling strength against edge loads without increasing overall rotor blade weight.

A gimbaled thruster configuration integrates a servo system with a thrust motor assembly to enable wide-range tilting motion.

Bulkhead alignment pins and bushings enable precise mating of wind turbine blade sections, resolving assembly difficulties caused by large component weight.

An integrated actuating member houses a locking member in a recessed angular portion, eliminating separate locks to reduce mass and complexity.

A gimballed coupling replaces complex pitch control mechanisms to reduce device complexity while maintaining directional flight capability.

Fabric-embedded composite impellers eliminate adhesive bonding, reducing weight by 75% while maintaining mechanical strength at high rotational velocities.

An oval spar with an integral tang replaces complex D-shaped spars, reducing manufacturing time and cost for tiltrotor aircraft.

Multi-axis accelerometers determine blade positions to schedule wireless communications, avoiding tower shadowing areas and improving reliability.

Segmented pitch cylinder slots align with blade sleeve slots to lock discrete angles, reducing measurement time during rotor performance testing.

A speed-augmenting gear train drives an internal generator to supply pitch control and de-icing systems, eliminating hydraulic parasitic losses.

A movable counterweight on a propeller blade transmits torque to adjust pitch angle, avoiding interference with adjacent blades during position transitions.

Variable thickness shell sections with reduced rigidity mitigate high torsional stiffness near the root, allowing greater aerodynamic twist under bending loads.

A self-articulating ring wing pod uses distributed propulsion elements to independently control thrust vectors and aircraft attitude.

A centrifugal impeller and propeller pump system moves liquid through a combined rotating assembly.

A rotorcraft propulsion system uses counter-rotating radial and axial rotors to generate lift and thrust.

Rotating the wing parallel to the fuselage via a stow ring reduces storage footprint while maintaining flight versatility.

A locking device uses centrifugal force to engage a movable member during high-speed rotation while a solenoid retains the unlocked position.

Segmented concentric tubes actuate rotor blades axially, reducing buckling risk and enabling lighter upper shafts.

Nesting the light probe inside the stator vane airfoil prevents debris accumulation that reduces measurement precision.

Tapered blade edges extend beyond the front plate to increase surface area, avoiding costly tooling reconfigurations required for standard modifications.

Rotatable stator blades in a ducted tail rotor automatically align with airflow to reduce drag, improving thrust generation efficiency.

Mixed round and non-round exit apertures in a turbine blade tip shroud cool the component while maintaining full surface area for exhaust gas containment.

Morphable leading edges and movable vanes adjust thrust vectors on ducted fans, resolving insufficient control redundancy in modular aircraft designs.

Automated controller testing of propeller overspeed protection logic reduces pilot workload by overriding ground mode signals to simulate flight conditions.