ANDRITZ Equipment
Escher Wyss controllable pitch propellers
Escher Wyss controllable pitch propellers from ANDRITZ Hydro for naval and coast guard vessels, mega yachts and special vessels, featuring a double trunnion bearing design, small hub ratio and low pressure pulses.
Description
Escher Wyss controllable pitch propellers (CPP), supplied by ANDRITZ Hydro, are tailor-made CPP systems for naval and coast guard vessels, mega yachts and other special-application vessels. Designs balance propulsion efficiency, low noise, flexibility and speed, and propeller performance is verified at independent international model basins.
Key features
- Exclusive trunnion bearing system with double bearing, used by Escher Wyss for turbines and CPPs
- Smaller hub-to-propeller ratio than conventional CPP designs, supporting low-noise blades and high efficiency
- Blade and trunnion cast in one piece; smooth blade root without bolt pockets, delaying root cavitation inception by up to six knots
- Advanced wake field adapted design (AWAD), very low pressure pulses and extended cavitation inception speed (CIS)
- Hub shape designed for minimum resistance and delayed hub vortex cavitation
- Large hydraulic servomotor piston with long stroke for precise pitch control at relatively low hydraulic pressure
- Suitable for dynamic positioning requirements
Options
- High-skew blades for mega yachts and naval vessels, with pressure pulse amplitudes below 1 kPa achievable
- 7-bladed propellers, including air emission system, for the most demanding noise and vibration requirements
Service
OEM spare parts, troubleshooting, hub overhauls, midlife upgrades with modern control technology and planned docking support from the team in Ravensburg, Germany, and worldwide.
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