Propellers TRIZ Cases

Multi-mode microwave waveguides steer blade-sensing signals by mode, improving reflection accuracy while cutting heavy engine cabling.

Equal and opposite PWM vectors let dual inverters share a stabilized DC bus, cutting eVTOL noise and vibration while preserving redundancy.

Thermoelectric elements create controllable temperature gradients to manage jet effects, improve laminar flow, and suppress turbulence.

Optimization-based control splits eVTOL thrust across propulsion units to spread noise frequencies and balance battery pack energy draw.

Fire-resistant lubricating oil is circulated through the eVTOL gearbox to cool components, maintain lubrication, and reduce leakage-related fire risk.

Offsetting the rotating ring mass toward the suction side counters thrust-induced blade-tip shift and keeps the rotor-stator magnetic gap stable.

Active inverter short circuits and propeller feathering redirect regenerated motor current during aircraft propulsion faults.

A hinged cockpit and wing assembly lets this VTOL biplane lift off as a quadcopter, then shift to efficient lower-noise cruise flight.

An electric-motor-driven second propeller lets an open-rotor turbomachine balance thrust, extract mechanical power, and ease compressor load.

Managed rotor power, wings, and a stabilizer balance nose-up thrust moments to cut drag and improve hybrid gyrodyne forward flight.

A planetary eVTOL gearbox and fire barrier reduce noise, vibration, heat, and flammable fluid risk while preserving redundant propulsion.

By moving motors outside the center hub and driving a rotating ring through gears, this case cuts pressure loss and improves aircraft thrust.

Spiral-wound composite material binds the support ring and magnets to withstand centrifugal force and raise rotor load capacity.

Axially staggered fan blades increase rigidity to limit thrust-induced ring displacement and keep rotor-stator magnetic gaps stable.

Integrated inverter packaging with pinned capacitor-PCB alignment supports cooling, lower noise, and redundant eVTOL propulsion.

A thermal plate linked to the end bell moves motor heat to a fluid heat exchanger, improving eVTOL propulsion cooling and safety.

Orthogonal lift fans and a tail pusher propeller enable VTOL flight without tilting propulsion parts, reducing complexity and maintenance.

Power-managed coaxial rotors and wing-stabilizer balance enable autorotation cruise control with lower drag and simpler maintenance.

By placing the pitch displacement member inside the stator, this motor unit cuts axial size, suppresses vibration, and improves cooling.

Intermeshing gearwheels both pump hydraulic fluid and drive the pressure-control device, cutting propeller pitch system weight and space.

By placing the pitch-changing member inside the stator, this aircraft motor unit cuts axial size, reduces vibration, and supports motor cooling.

Rotating-ring ducted annular rotors cut energy use while improving thrust, stability, and flight range in drones and personal air mobility aircraft.

Optimization-based control allocation distributes eVTOL actuator commands to meet force targets while reducing rotor noise and balancing battery energy.

Bidirectional propellers and a buoyant housing let one waterproof UAV capture images and maneuver smoothly in air and underwater.

Sensors detect object proximity, current, or force changes so an AAV can stop or redirect propellers before contact causes harm.

A gearbox layout with a through main shaft, hydrodynamic bearing, and cooling-lubrication support helps eVTOL engines cut noise, vibration, and wear.

A variable blade chord and rounded duct lip cut vortex loss and improve flow uniformity to raise static thrust in ducted fans.

A unified brushless motor drives both wheel and fan modes, reducing separate propulsion complexity for land travel and lift.

Sensor-driven flight envelope control adjusts attitude and power in real time to keep STOL aircraft safe during short takeoff and landing.

A segmented gearbox input shaft lets multiple motors drive separate shaft sections through overrunning clutches, easing assembly while preserving reliability.

Interference-fitted tapered magnets expand the sleeve to lock rotor magnets in place, improving durability and reducing noise, vibration, and heat.

A rotatable shroud lets one ducted fan switch between fluid thrust and wheel drive, cutting dual-system complexity, space, and fuel use.

Flywheel energy storage and gyro stabilization help this integrated disc flat wire ducted fan sustain rotor motion during power loss.

A tandem twin-cylinder engine drives generators to extend electric aircraft range while parallel batteries and motors preserve power after failures.

Negative pressure at the discharge port draws cooling air through a built-in channel to remove motor heat without reducing fan thrust.

A suction-side rotor mass layout counters blade thrust displacement, keeping rotor-stator magnets aligned for stable motor thrust.

An integrated sleeve and dog clutch locks a propeller at a fixed angle, cutting transmission complexity, space use, and wind-driven drag.

Rotatable pylon motors let tiltrotor aircraft switch between VTOL lift and high-speed forward thrust with lower weight and added payload flexibility.

A plug-in series hybrid-electric aircraft and distributed regional airport network cut door-to-door travel time and cost per mile.

A cylindrical nacelle air channel cools aircraft fuel cells through an internal heat exchanger while limiting drag during high-thrust phases.

Power-managed multi-rotor control balances lift, drag, and pitching moments to improve hybrid gyrodyne forward flight stability.

Corona discharge drives ionic wind to spin a rotary propeller, reducing heavy power electronics while enabling thrust and lift-off.

A hinged cockpit and wing assembly lets this ducted-propeller eVTOL shift from quadcopter takeoff to cruise with lower noise and better energy use.

Differential power control across coaxial rotors improves forward flight handling, reduces drag, and avoids extra control surfaces.

A rotatable duct deflector redirects engine exhaust and cooling air away from the propeller, preventing heat damage in hybrid air mobility layouts.

Independent speed-reference correction balances power across electric propulsion motors, reducing overheating risk without inter-motor communication.

A low-resistance slip ring and brush path diverts lightning and stray charges away from bearings and the feedback ring to preserve blade angle accuracy.

Net rotor power balancing lets motor-generators control lift and attitude in forward flight while reducing drag and swash plate complexity.

Multiple planetary gear sets share torque in an eVTOL gearbox to improve redundancy, cut vibration, and support low-oil cooling.

Angled swirler vanes generate turbulence that reduces bleed air pressure and velocity, eliminating supersonic noise in compact engine spaces.

A variable geometry inlet transitions between operational modes using a retractable ring and pressurizable tube to adjust the leading edge shape.

A locking spacer assembly with radially inward and outward supports maintains turbine blade spacing.

A dual-coil feather solenoid modulates hydraulic fluid to adjust propeller blade pitch using independent magnetic actuation.

A distributed control system connects multicopter rotors through a fail-safe network to autonomously determine flight stability signals.

Segmenting propulsion into distributed electric ducted fans reduces system complexity while enabling automatic stabilization and directional control.