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A propeller may be in perfect static and still not be balanced at higher speeds of rotation. Dynamically balancing is very important to a high-speed propeller.
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When it comes to safeguard national security, you certainly do not want to make compromises. Maritime superiority and defense readiness are of crucial importance to ensure a successful mission of naval vessels in times of crisis and conflict as well as for maintaining peace at home or abroad.
When it comes to these vital questions you want to have the best equipment available for your Navy. You want to have the world leader in innovation, design, and manufacture of naval controllable pitch propellers (CPPs) at your side: ANDRITZ HYDRO with its Escher Wyss controllable pitch propellers.
Our leadership in this domain has been acknowledged by our customers and their positive experience throughout decades of navy services. It is proved by the quality of our innovative and numerous navy references. It is demonstrated by the concept of our unique technical design.
Each Escher Wyss naval CPP is a tailor made product based on the continually improved design features and principles of a more than 45 years exclusive development of naval propellers. It is not the result of an adaptation of commercial or civil applications.
Stringent noise requirements for SILENT THRUST and absolute reliability in adverse environmental conditions are of vital importance for a successful mission of naval vessels. Additionally, an economic operation with high propulsion efficiency, easy maintainability and low life cycle costs must be ensured during peaceful times. Consequently, all these fundamental aspects are thoroughly considered in our design efforts.
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Propellers are designed with a computer panel code method allowing the entire 3-D study and optimization of the geometry. To properly interface the propeller with its intended application the hull lines of any design of particular importance can be preliminarily analyzed to predict resistance, trim and wake field at the prpeller disc. Once the velocity field on the propeller has been computed, it is used as "inflow" for the design of the propeller with the panel method and CFD (Computational Fluid Dynamic) analysis.
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Propellers are designed from systematic series based on tunnel testing and permit ROLLA to calculate torque - thrust coefficients, efficiency and horizontal - vertical force figures for different shaft inclinations and propellers immersions.
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Blades: 3,4,5
Pitch Ratio: 0.60-1.60
Area Ratio: 0.55-0.75
Skew Angles: 0° , Skew available
Section Type: Aerofoil:
Remarks: Suitable for accelerating nozzle propellers and bow or stern thrusters.
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Yuanhang designs and manufactures Fixed pitch propellers for container ships, cargo ships, tankers, tug boats, trawlers and fishing boats etc.
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For decades, the MMG manufacturing program includes propeller blades for the most different purposes in use, as CPP propellers, build up propellers and POD drives for various typs of ships.
It will be precisely casted and manufactured according to the specifications and construction requirements of our customers.
Almost all noted manufacturers of CPP propellers in Europe and Asia are part of our clientele.
Long-standing experience in dealing with the most different constructions of propeller blades, efficient CAD technology, nonpolluting foundries, most up-to-date 5-axis CNC milling technology and the qualification of our employees are the guarantor for the 100 percent observance of the customer`s requirements in the respective construction of the propeller.
A taking over of the data files is possible, directly from the CAD programs of our customers into the MMG CAD-Sytem.
MMG supplies propeller blades of all sizes and designs.
An efficient technology in casting, measuring and machining as well as the long-standing experience of our employees safeguard the highest possible level of quality in all lines of production.
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Controllable Pitch Propellers
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