Efficient Propulsion Technologies TRIZ Cases

By drying ambient air before evaporative chilling, this case restores intercooler cooling in humid conditions and boosts gas turbine output.

By moving the generator rotor onto compressor blades and cooling the stator with bypass airflow, this case cuts heat, weight, and access issues.

Flight-plan and battery-state control assigns electric motor use by waypoint to preserve battery reserve, improve fuel use, and avoid extra power systems.

Motor voltage is adjusted from flight state and environment data to keep UAV thrust within a controllable speed range and avoid power saturation.

Flight-plan waypoints shift battery and fuel power by flight stage, improving hybrid aircraft efficiency while preserving battery reserve.

Two smaller thermal engines plus an electrical machine meet OEI power needs in rotorcraft while cutting weight, fuel use, and maintenance.

A magnetic lock holds unused eVTOL rotors stationary in flight, cutting drag while allowing rapid release when propulsion is needed.

A closed-loop hydrogen-helium mixture improves cryogenic heat removal from stator and rotor windings while staying below flammability limits.

A controller-driven magnetic lock holds unused eVTOL rotors in position to cut drag while allowing normal rotation when propulsion is needed.

Smaller twin thermal engines pair with an electrical machine to meet OEI power, cutting rotorcraft weight, fuel use, and maintenance.

A fuel cell turboshaft layout replaces combustion hardware to cut moving parts, noise, heat signature, and aircraft engine maintenance.

Closed-loop electric machines stop single-blade rotors during flight transition, removing separate brakes and recovering energy.

Stacked battery cargo platforms extend electric aircraft range while enabling parallel power connection, load sensing, and faster battery swaps.

Swingable rotor arms and elongated side batteries let this multicopter fold compactly yet deploy fast for stable heavy-load transport.

A cargo-bearing battery platform enables simultaneous loading and charging, while stackable modules extend range for electric aircraft and drones.

A hybrid engine-motor control section switches drive modes and clutch states to cut noise, extend flight range, and maintain propulsion redundancy.

A series MOV, thyristor, breakover diode, and Zener path lowers clamping voltage while handling fast-rising MVDC fault currents.

An internal heat exchanger keeps combustible motor coolant enclosed while a separate non-combustible loop removes heat for safer aircraft drive cooling.

Multiple battery blocks and a battery circuit board let a UAV power modules simultaneously, increasing capacity and extending flight endurance.

Adaptive robotic machining tunes CMC aerodynamic surface roughness before coating, improving coating readiness, yield, and waste reduction.

When onboard equipment fails, the controller cuts power to external implements and preserves rotor power so the UAV can keep flying and land safely.

Direct engine drive for the main rotor and electric sub rotors cuts conversion loss while boosting payload, endurance, and tilt control.

A direct-drive main rotor with electrically driven sub rotors cuts energy loss while improving payload, flight time, and fuselage orientation control.

When onboard equipment fails, the control device cuts power to the external implement and keeps rotor motors powered to sustain stable flight.

Ground sensing guides low-power UAV landing by avoiding water, trees, roads, and people to reduce crash, explosion, and injury risk.

A CVT-based splitter and bevel gearbox layout enables stepless propeller speed control, smoother flight, and higher take-off weight.

Sensor data and Bayesian wake vortex estimation keep the follower aircraft outside passenger discomfort zones while preserving updraft benefits.

On-board sensing and Bayesian wake tracking keep a follower aircraft out of discomfort zones while preserving drag and fuel benefits.

A tiltable proprotor and central autorotating rotor layout enables VTOL, hover, and efficient forward flight with stable transition control.

A hydraulic and electric shaft lock prevents accidental thrust reverser deployment while cutting weight, complexity, and extra hydraulic lines.

Sensor feedback lets the flight computer detect a failing rotorcraft motor, rebalance power, and preserve thrust and torque for safe landing.

Ground hazard detection guides low-power UAV landing by hovering and deviating from unsafe areas to reduce crash and explosion risk.

Tiltable side proprotors and a powered central rotor enable VTOL, hover, and efficient forward flight with smooth mode transitions.

On-demand blending of two fuels adjusts soot emissions from ambient and engine conditions to limit contrail optical depth with low weight penalty.

Adaptive machining tunes overly smooth and rough CMC turbine surfaces to coating-ready roughness, reducing manual cleanup and coating defects.

A tiltable proprotor layout with an autorotating central rotor resolves the VTOL versus energy-efficiency tradeoff while maintaining stable transition flight.

Robotic machining adjusts overly smooth and overly rough CMC surface sectors to a coating-ready finish for gas turbine components.

State feedback with a static compensator decouples aircraft engine power and speed, reducing torque interaction while keeping tuning simple.

State-feedback decoupling splits interacting aircraft engine variables into adjustable mono-variable loops to limit over-torque and overshoot.

Tiltable side proprotors and a central rotor combine VTOL, hovering, and lower-energy forward flight through powered lift and autorotation.

A multi-plate rotary valve cuts pressure loss and opening force, enabling smaller actuators in gas turbine engine fluid control.

A rotary shaft lock uses hydraulic piston release and an electric lock pin to prevent accidental thrust reverser deployment with less weight and complexity.

Localized high-flux shaft teeth enable accurate turbine torque sensing without forcing the full shaft to use magnetically favorable materials.

A released cutting tool severs a calibrated shaft section to disconnect the generator at low torque while preserving high-torque protection.

Strategically placed ballistic patches absorb impact energy and close openings, cutting fan containment case weight without losing blade retention.

A gas-generator jet engine uses dual combustion chambers and adjustable square nozzles to improve low-speed thrust while reducing emissions and cost.

Real-time standardized power margins let hybrid aircraft control systems validate maneuvers within available source and consumer limits.

Deployable deflecting membranes replace cascade vanes to boost counter-thrust while cutting reverser length, mass, drag, and fuel burn.

A hybrid composite uses 3D Z-fiber reinforcement only in heavily loaded regions, cutting fabrication cost while maintaining strength.

Electric-machine ventilation keeps the gas generator rotating after shutdown, allowing rapid helicopter rotor braking without thermal engine damage.

A split main-battery and sub-battery architecture lets hybrid UAVs keep precise attitude control while extending flight time and payload.

Coaxial turboprop engines use swirl-adjusting inlet guide vanes and internal heating channels to limit high-altitude ice formation.

A locking pawl with an elastic return mechanism decouples a variable nozzle section from a thrust reverser cowl, enabling independent actuation during takeoff.