Propellers TRIZ Cases
- Nested Actuator Rod Assembly for Fail-Safe Blade Pitch Control
A tensioned inner rod inside a tubular outer rod adds fail-safe load bearing, fatigue tolerance, and visible failure checks in blade pitch control.
- Rotorcraft Powerplant Speed Regulation for In-Flight Noise Reduction
Gradual rotor speed reduction with backup engine support cuts rotorcraft noise in flight while preserving lift margin and stability.
- Variable-Torque UAV Propellers for Motor-Out Flight Control
Adjustable propeller blades increase drag-generated torque to preserve UAV controllability and enable safer landing after propulsion faults.
- Snap-Fit Propeller Hub Locking Against Shaft Detachment
An elastic snap-fit hub lock keeps the propeller attached during speed changes and vibration while allowing tool-free removal after crashes.
- Bonded Rotor Blade Cover Structure for Shear-Resistant Coupling
A dual-cover airfoil uses rib-engaging corrugated coupling elements to resist shear loading and improve rotor blade fatigue life.
- Length-Adjustable Link for Tiltrotor Blade Transition Control
A threaded adjustable link helps tiltrotor blades shift to non-rotary flight, reducing aeroelastic instability and enabling higher cruise speed.
- Turboprop Propeller Speed Control for Maximum Efficiency
Closed-loop propeller speed and torque correction keeps a turboprop at efficient operating points across changing flight conditions.
- Sliding Lock Ring Assembly for Releasable Engine Nosecones
A spring-biased sliding lock ring secures a threaded engine spinner or nosecone, then releases it without deformable lock hardware.
- Flight Attitude Control Prioritization for VTOL-Biplane Transition
Ranks thrust vectoring, rotor speed, and aerosurfaces by control authority to stabilize hover and smooth VTOL-to-biplane transition.
- Airfoil Sensor Array and Neural Control for Drone Stall Detection
Micro airfoil sensors and a pre-trained neural network detect stalls and vortex ring states early, enabling automatic control correction and lower power use.
- Rapid-Connect Aircraft Propulsion Nacelles for VTOL Thrust Vectoring
A gimbaled rapid-connect nacelle combines battery, motor, and controls to speed aircraft assembly while enabling stable hover and VTOL transition.
- Battery-Based Vibration Attenuation for Aircraft Airframes
Aircraft batteries mounted on elastic devices absorb rotor-induced vibration, cutting resonance without adding dead weight or extra hardware.
- Counter-Rotating Propeller Layout for UAV Yaw Torque Stability
Counter-rotating propellers in airframe quadrants rebalance thrust after unit failure, limiting yaw torque and airframe stress.
- Gimbaled UAV Propulsion Units With Variable Pitch for Thrust Control
Linear actuators adjust gimbal angle and blade pitch in UAV propulsion units to direct thrust precisely while also shaping noise output.
- Anti-Torque Rotor Interface for Bearing Failure Control Continuity
Antifriction interfaces and failure sensing help an anti-torque rotor maintain blade control when bearing damage causes twisting moments.
- Anisotropic Assembly Fixture for Composite Thermal Expansion Matching
Aligned reinforcement fibers tailor fixture expansion to match composite parts, reducing tooling cost, distortion, and cure cycle time.
- Axial Locking Ring for Fail-Safe Retractable Driveshaft Engagement
An elastic locking ring uses axial shaft motion to hold a retractable driveshaft without actuators, improving fail-safe wing engagement.
- Rotor Fairing Seal Assembly for Drag Reduction and Access
A resilient seal assembly closes the gap between hub and fixed rotor fairings to cut drag while allowing fairing removal without disturbing the seal.