Rotary Propellers TRIZ Cases

Distributed electric thrusters mounted across the hull improve low-speed maneuvering while cutting power use, clutter, and repair burden.

Electrical isolation between the propeller shaft and drive housing blocks galvanic corrosion and removes the need for sacrificial anodes.

By removing the rotating drive shaft from the intake flow, this motor cuts turbulence, cavitation, drag, and corrosion in marine propulsion.

Distributed electric thruster units mounted across the hull improve low-speed maneuvering while cutting space, power use, and replacement cost.

Direct-drive coaxial motor and propeller generate high torque without reduction gears, cutting weight, friction, and cooling limits in marine propulsion.

Elastomeric tapered bushings in isolated mounts decouple a hydrofoil propulsion pod from the strut to cut rider noise and vibration.

Independent electric thrusters mounted around the hull improve low-speed steering, precise positioning, and docking control.

Direct rotor-impeller coupling removes the drive shaft from water flow, cutting turbulence, cavitation, drag, and marine wear.

A watertight buoyant hull, waterproof battery modules, and pivoting propeller steering let one electric vehicle travel on land and water.

A slack flexible conduit links the steering housing and steering column, enabling lower-unit rotation while keeping oil sealed and water out.

A watertight buoyant hull, waterproof battery modules, and dual propulsion enable one electric vehicle to move seamlessly on land and water.

A restraining ring integrates the support ring and rotor magnet to withstand centrifugal force while keeping motor gaps small and performance stable.

Correcting rotor magnet position drift from eddy currents lets a marine propulsion controller apply stator current at the right timing for maximum torque.

An elastic entry suppressor blocks debris from the duct-rim gap while limiting friction, wear, and propulsion power loss.

A partial-contact entry suppressor blocks debris from the duct-rim gap while limiting friction, power loss, and motor output drop.

Independent electric thrusters placed across the hull improve low-speed steering while cutting housing bulk, power demand, and repair effort.

A controller switches a propeller shaft between engine drive and battery-powered motor drive to extend low-speed cruising and cut fuel use.

A slack flexible conduit links the steering housing and steering column, preserving seals, sensor wiring, and lubricant monitoring during lower unit rotation.

An axial-flux coaxial motor raises low-speed marine propeller torque without reduction gearing, cutting weight, friction, and maintenance.

Elastomeric vibration-isolating mounts decouple a hydrofoil propulsion pod from the strut to cut audible noise and vibration transfer.

Magnetic spring restoring force lets a cantilever fan run at higher frequency while keeping blade stress below fatigue limits.

Active valve-controlled aeration adjusts propeller ventilation to cut cavitation and drag, improve planing, and prevent engine overload.

A torque clutch decouples the trolling motor steering shaft under impact loads, protecting gears and the steering motor from damage.

Centrifugal lubricant flow moves liquid through marine propulsion bearings to improve cooling while lowering cavitation risk.

Water-intake detection delays propulsion until the pool robot is submerged and settled, reducing trapped gas and shortening bottom-settling time.

A torque clutch decouples the trolling motor steering shaft under impact loads, preventing gear and motor damage and recoupling automatically.

Hull behavior feedback triggers automatic counter steering and trim adjustment to reduce chine walk and improve high-speed vessel stability.

Mirrored leading and trailing edge profiles let a tail rotor reverse direction and vary RPM for faster, more efficient yaw control.

Sonar, image comparison, and distress-sound detection let the lifebuoy find a person overboard without remote control or risky manual guidance.

A passive torque clutch decouples the steering motor from the shaft under impact loads, protecting the gear train and extending service life.

A rotating driven coupling on a spacer bushing protects propeller shafts and splines from obstacle damage while maintaining torque transfer.

Mirrored leading and trailing edges let a fixed-pitch tail rotor reverse direction and vary RPM for faster, simpler yaw control.

Blades fold into a continuous spindle shape to cut sailing drag while preserving propulsion and energy regeneration efficiency.

Fluid counterpressure bends catheter pump rotor blades from a folded insertion state to an expanded pumping state without complex actuation.

Controlled tip swirl from the forward propeller is recovered by a larger aft propeller to cut drag, interference, noise, and vibration.

Guide fins ahead of twin-screw propellers create targeted pre-swirl to correct uneven inflow, cutting swirl losses and propulsion power demand.

Curved hub-mounted fluidic elements redirect wind at the rotor root to reduce leakage, increase torque, and lower turbine noise.

A detachable hydrojet with a conical finned inlet and stator improves low-speed thrust, limits debris entry, and cuts electric power loss.

Specific blade-to-drive-leg phasing in counter-rotating propellers cuts vibration and noise while preserving marine propulsion efficiency.

Rotating a free-floating wave engine creates Magnus-effect forces for stationkeeping, avoiding tethers while maintaining wave energy capture.

Non-uniform symmetric strut spacing cuts water resistance and blade overlap, improving thrust stability and design freedom in ducted propulsion.

A harder integrated thrust bearing distributes axial loads in a boat propeller hub to reduce wear, loosening, and strut contact damage.

Co-rotating blade rows arranged helically on one hub help propellers stay efficient across varying advance ratios.

A vertical engine-motor-inverter layout shrinks hybrid ship propulsion machinery while preserving engine-to-motor power source switching.

By stacking the engine, motor, inverter, and switching mechanism in a tight vertical layout, this marine propulsion case cuts hybrid system size.

A reconfigurable gearcase nose cap adjusts water flow and pressure in high-mounted marine drives to sustain cooling and reduce cavitation.

An electric propeller and modular hydrofoil layout replace gas propulsion to deliver quieter foiling, smoother mode transition, and easier transport.

Tapered helical blades increase surface area toward the hub to guide fish away, while reducing turbulence, noise, and cavitation.

Surface veins and a central rib guide fluid to boost autorotation, improve lift generation, and reduce drag in rotating blade assemblies.

A foam cover sleeve with flexible straps and buckles shields sharp propeller edges while allowing fast installation and removal.

Angularly staggering counter-rotating propellers around the drive leg reduces vibration and noise from non-uniform flow while preserving thrust.

Staged elastic deformation of separable propeller dampers reduces rattling noise and shift shock while maintaining driving force.