Rotary Propellers TRIZ Cases
- Conical Propeller Blade Geometry for Lower Turbulence Thrust
A conical blade layout redirects flow axially downstream instead of radially inward, cutting turbulence and improving propeller thrust efficiency.
- Helical End Cap for Boat Engine Exhaust Vortex Guidance
A helical end cap on the propeller nut redirects boat engine exhaust into a directed vortex, cutting turbulence and fuel-wasting propulsion loss.
- Duo-Propeller Blade Loading for Tip Vortex and Swirl Recovery
Blade loading shifts swirl generation away from harmful tip vortices, letting the aft propeller recover more outflow energy with less drag.
- Contra-Rotating Propeller Drive With Dual-Rotor Motor and No Gearbox
A dual-rotor motor and dual-shaft layout drives contra-rotating propellers without a gearbox, cutting energy loss and maintenance.
- Human-Powered Hydrofoil Vehicle With Launch-Phase Pitch Lock
A buoyant lock holds the movable control surface at the correct angle during submerged launch, improving hydrofoil stability for novices.
- Modified Propeller Blade Section for Air-Lubricated Ships
Wedge air ducts, an air distributor, and a modified propeller blade section cut drag without letting residual air degrade propulsion efficiency.