MAN Alpha Naval Propellers
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This Is a Headline MAN Alpha This is a subheadline High-performance Naval Propellers

Highest Propeller Performance Reduced Hydroacoustics Increased Flexibility Larger Fuel Savings Lowest Total Cost of Ownership MAN Alpha – Naval Propellers

MAN Alpha Naval Propellers Reliable systems tailored to tough demands MAN Diesel & Turbo is proud to present a naval propeller programme, which has been developed on the basis of the industry's state-of-the-art design and optimisation tools combined with the vast experience accumulated from more than 7,000 propellers. A long tradition and a grand heritage with propellers for both commercial marine and military applications date back to the first Alpha design, which was produced in 1902 and patented in 1903. Flexibility for covering efficiently any propulsion power requirement in the 4-40 MW...

Increased Propulsive Efficiency Hydrodynamic competences in force For maintaining and developing MAN Diesel & Turbo's position in the propulsion forefront, many resources are invested and the latest advanced design tools including e.g. CFD (Computational Fluid Dynamics), FEM (Finite Element Methods) and Topology Optimisation are deployed. To verify the calculations, MAN Diesel & Turbo cooperates with the world's leading test tanks and research institutes. Hydrodynamic design characteristics Operational advantages Maximised efficiency with due respect to controlled cavitation, pressure...

Hydrodynamic integration and optimisation The perfectioned layout and hydrodynamic propeller integration are always optimised with the ship's hull and any 'flow-guiding' devices placed before the propeller, e.g. pre-swirl fins and vortex-generators. After the propeller, the optimisation will consider high-efficiency rudders, integrated rudder bulbs, post-swirl fins or similar. According to a recent design study, the combination of a 5-bladed propeller with Kappel blades and fairing cone operating with a rudder with integrated rudder bulb will offer a power saving of up to 9%. MAN Alpha –...

High Propulsion Performance and Low Noise Innovative Kappel propeller blade designs Multiple MAN Alpha propeller design solutions are available – all the way from propellers based on the very advanced and unique Kappel tip fin design to conventional blade designs for both CPP and FPP in 4 and 5-bladed executions. Nature of optimisation parameters High efficiency Lower speed and larger propeller diameter The Kappel propeller minimises the flow over the tip, Larger diameter and blade number optimisation and the outer region of the Kappel propeller therefore Lower pressure impulses and smaller...

Scale model 1:28. A 6.4 metre MAN Alpha fixed pitch propeller with Kappel blades - optimised for a feeder vessel Kappel submarine propellers for silent missions: 8-bladed model propeller test and 7-bladed propeller finished machined MAN Alpha – Naval Propellers

Reliable CP and FP Propeller Designs Mechanical robustness and safe handling The hubs are designed and optimised with due consideration to the propeller/shaft torque, material properties and weight. The MAN Alpha propeller reliability and durability have always been very high, and the latest generation of CPP and FPP designs follows that philosophy. Mechanical design characteristics Robust approach – with ample design margins As standard, the propeller material is specified as G-CuAl10Ni. Other material available upon request the complete system's torsional response Compact hub/blade root...

More speed and power featured Novel blade and blade foot design advantages: The 'multi-radius-fillet' design reduces the blade weight by approx. 4% and contributes to a higher cavitation inception speed The optimised hub/blade interface allows for higher propulsion power densities. Operational advantages Low wear rates and very long lifetime Higher reliability with few components Reduced bearing loads due to low weight Smaller hub dimensions resulting in high efficiency Large pitching range and great manoeuvrability Increased service and inspection friendliness. MAN Alpha – Naval Propellers

Plant Competence and Added Customer Value Perfect tools and know-how for integrated solutions COPS – a unique layout tool The propeller range offers excellent coverage COPS is an abbreviation for Computerised Optimi- The propellers handle outputs from 4,000 to 40,000 sation of Propulsion Systems. MAN Diesel & Turbo's kW per shaft. Multiple propeller solutions are available COPS expert system ensures better and more ac- for direct coupled, geared diesel-mechanical, diesel- curate pre-optimisation of hydrodynamic/mechani- electric, hybrid and combined propulsion plants. cal aspects,...

Tailored propeller systems and stern tube concepts: compact and optimised installation dimensions are ensured in consideration of e.g. ships' hull shape, rudder arrangement, engine room, shafting and stern tube equipment. Optionals and special installation requirements Customised stern tube solutions MAN Diesel & Turbo masters a vast number of disci- Water lubricated stern tube systems are often se- plines in relation to optimisation of aftship parameters lected and tailored for naval propeller installations – and special installation requirements, such as: including our new compact and...

Robust Hydraulic and Servo Systems CPP manoeuvrability – swift and safe A shock resistant hydraulic power unit – and an ODF oil distribution unit prepared for flooded compartment operation: the ODF design includes a unique 100% linear feedback system – a contact-less ultrasonic design with no use of linkage bars. No wear and no hysteresis in feedback Hydraulic power unit The hydraulic power unit offers high-volume hydraulic modes ensuring optimal 'crash stop' opportunities. ODF oil distribution unit A new, very compact ODF oil distribution unit has been developed for gearbox mounting. A...

Shock Excitations, Design Precautions and Testing Calculations and analysis of propeller and shaft system Shock excitations in the shaft lines A complete MAN Alpha propeller system can be designed and documented to any shock requirements. A full shock response analysis is carried out for the complete scope of supply in accordance with current military standards. This serves to ensure that all mission critical compoFull-scale shock testing – from underwater explosion nents are designed with ample safety margins against underwater shock inputs. Controlled torsional vibrations An MAN Alpha...