Propulsive Elements TRIZ Cases

A watercraft trim system pivots a nozzle via a control unit to adjust operating angles based on detected conditions.

Intermediate compartment air pressure stays below seawater levels, reducing component count and simplifying maintenance access for propeller shaft sealing.

Indexed slots on the propeller hub modify limit stop abutment positions, resolving imprecise manual grub screw adjustments.

A vessel propulsion apparatus uses a forward bucket to tilt water streams from a deflector, generating lateral thrust for turning.

Adjustable biasing components on a movable nozzle resolve the contradiction between maneuverability and stability in personal propulsion devices.

A control system adjusts blade angles during watercraft stopping maneuvers to minimize the required stopping distance.

A watercraft propulsion system inverts impeller rotation via a disconnected direct linkage to clear jet clogs.

Movable venturi doors open apertures during reverse rotation to clear debris clogs and maintain thrust without manual hull access.

A control unit adjusts power to ship propellers based on real-time operating parameters.

A controller detects reverse gate operator position to prevent prime mover startup during shifting.

Air gap between shroud members forms viscous layer that reduces drag on surface-piercing propeller.

A watercraft controller adjusts trim angle based on wave detector readings to manage hull orientation.

Rotating discs adjust orientation to minimize drag while maintaining stability across varying speeds.

Radial propellant arrangement and variable-thickness barrier membranes isolate combustion zones to reduce structural weight while maintaining igniter strength.

Independent swivel thruster assemblies simulate unstable diver motion, resolving the contradiction between platform stability and realistic movement simulation.

Pump-jet propulsion apparatus with diffuser and direction control wings resolves vibration and low-speed force trade-offs for fine attitude control.

A reverse gate actuator moves a watercraft jet deflector at variable speeds based on real-time vessel velocity signals.

A water-jet drive incorporates a rotating bronze screw to clean internal ducts, removing marine fouling that reduces operational life.

Segmented reverse gate scoops and auxiliary nozzles redirect water jets to generate lateral thrust, resolving weak propulsive force during reverse maneuvers.

Spherical glass pressure housing reinforced with a titanium band shields internal equipment from seawater intrusion.

Multi-directional discharge ports in the steering nozzle bucket distribute water jet momentum laterally and rearward, preventing acute turns when pivoting.

Dynamic operating point selection adapts to travel conditions, resolving efficiency and noise trade-offs across surface and submerged modes.

An ROV replaces large surface vessels by using rotational thrusters to install helical anchors, reducing seabed disturbance and operational costs.

Integrated housing combines local illumination and sediment dredging mechanisms to resolve muddy water imaging contradictions.

Eccentric stubs linked to internal shafts adjust each blade angle to match local fluid speed, reducing cavitation and hull vibrations.

Segmented clamping halves and redundant positioning rings prevent C-clip ejection and corrosion wear on personal watercraft drive shafts.

A reverse gate actuator moves a watercraft deceleration gate using variable speed profiles based on device position.

A robotic jellyfish uses a torque reaction engine to accelerate thrust fluid for propulsion.

A vessel propulsion guide splits water flow into branch streams to generate oblique forward jets.

A swimming pool cleaning machine power unit channels water through a spiral and linear outlet to deflect the device.

A variable pitch boat propeller uses elastic retaining means to hold the external cylindrical body in position.

Planetary gear reduces high-speed electric motor rotation to drive propellers, resolving installation space constraints in marine transmissions.

A jet watercraft controller monitors reverse gate position to correct movement deviations automatically.

Segmented coaxial propellers reduce kinetic energy loss in deep water while keeping the large outer blade stationary to prevent grounding in shallow drafts.

Compact marine propulsion lower unit features nested transmission components and parallel shafts for streamlined hydrodynamic profiles.

Replacing hydraulic systems with a mechanical screw assembly eliminates elastic deformation and oil leakage while maintaining high power transmission.

Intersecting swirl components from two centrifugal machines recover spin energy, reducing draft while maintaining propulsion force.

A propulsion system with counter-rotating impellers reverses liquid flow direction for efficient reverse thrust generation.

Dynamic bearings and resilient junctions center the propulsion chain, reducing mechanical stress from hull deformation.

A single rotary actuator drives both the variable trim support and reverse gate, eliminating separate mechanisms to reduce device complexity.

A self-adjustable marine propeller uses a linear actuator and motion transmission means to rotate blades around a radial axis for manual pitch changes.

Relocating propulsion to the hull sides resolves the trade-off between cargo capacity and hydrodynamic efficiency, increasing displacement by up to 15%.

Resilient mounts decouple a marine jet pump from the hull, absorbing torsional and axial vibrations that cause rider discomfort and require heavy components.

A turbine expands operating gas to mechanically drive a compressor within an underwater fuel cell propulsion system.

Bevel gears reverse drive shaft rotation for the front propeller, eliminating outer shaft alignment and lubrication losses.

A pivoting propeller shield covers the distal face to prevent contact while hydroplanes lift it clear during forward motion.

A retractable anchor fixture uses a resilient element to hold an anchor in extended or retracted positions within a deck aperture.

Movable nozzle openings hide within the hull to minimize drag and sonar echoes while enabling propulsion.

Dual water outlets provide independent reaction forces, preventing wheel idling during obstacle navigation.