Characteristics of our naval propellers
Specialized navy specifications are crucial. Our customized Alpha propeller solutions can cater to higher cavitation inception speeds, possible shock impacts, and mission-critical conditions requiring additional redundancy, silent operation with minimal hydro-acoustic signatures, and suppressed underwater-radiated noise.
CPPs, FPPs and bolted adjustable designs
Our naval propeller portfolio – ranging from controllable pitch propellers (CPPs), fixed pitch monoblock propellers (FPPs), and FPPs with replaceable blades to adjustable bolted designs with tailored blade configurations – offers excellent coverage of navies’ propulsive performance and reliability demands.
A wide range of naval and patrol vessels are powered and propelled by Alpha (former MAN Alpha) propeller and aft ship solutions. These include, amongst others, powerful combat frigates, flexible command support vessels, specialized minehunters, ice-breaking offshore patrol vessels, and robust shallow-draft coastal supply cutters.
Global approach – shafting and control systems
The mechanical and hydrodynamic design optimization of propeller shaft strut arrangements is one example of a key parameter for aft ship elements. CFD calculations and model tests confirm that propeller performance and strut designs are closely interlinked.
Shock requirements can be considered in the design for which, as an example, our global approach goes all the way and includes the Alphatronic propulsion control system. Here, shock load tests are performed with certification for panels passing 10 G in 10 ms, cabinets 20 G, and sensors (pitch feedback, tacho) up to 320 G in 3.3 ms.
Important numbers
Facts about our Alpha propellers
of CPP propulsion
pitch settings in tough CPP ferry operation
Your benefits on the right course
Best propulsive performance:Cutting-edge hydrodynamic blade/hub/strut designs as the basis for top propulsion performance and versatility in diverse operating missions.
Fuel savings and reduced emission levels:
High propulsive efficiency equals low fuel consumption and fewer exhaust gas emissions.
Reduced hydro-acoustics:
Maximized propeller efficiency design – targeted with due respect to required mitigation of cavitation, pressure pulses, and noise.
Shock resistance:
System solutions can be designed and documented to shock requirements and military standards – from propellers and shafting to propulsion controls.
Lowest total cost of ownership:
Robust and reliable materials and components – designed with ample margins of strength, ensuring minimal consumptions, low wear rates, and a long and safe service life.
Talk to our propeller and aft ship experts
Looking for a naval design propeller and aft ship solution?
Let us present what may be under the waterline – by tailoring the ideal solution for you. Get in touch today to propel ahead.
Alpha propeller and aft ship system solutions
System solution and scope of supply example
Get an overview of our propeller and aft ship offering: Take a quick journey along the shaftline of a full feathering CP propeller and aft ship system with major components and options presented. A final optimized propeller design and blade number integrates e.g. with strut bracket angles, bracket profiles, and position for the best possible wakefield for the propeller.
By loading the video you agree to YouTube's privacy policy.
Ice Class propelled OPV “Ejnar Mikkelsen”
Offshore Patrol Vessel – arctic operation
For operation in ice, our CPPs and bolted FPPs can be delivered up to the highest polar ice classes. The CPP equipment propelling the OPV “P571 Ejnar Mikkelsen” is designed in line with ice class DNV/GL Ice 1A. The propulsion power is delivered by two 8L27/38 engines with a twin-in/single-out gearbox configuration.
By loading the video you agree to YouTube's privacy policy.
Large controllable pitch propeller
Large CP propeller type VBS 2150
With a propeller diameter of 7.6 meters, the VBS 2150 propeller system is our largest Alpha design so far. The hub weighs 36 tons plus the five blades weighing 26 tons, totaling 62 tons. Complete with shafting, the finished CP propeller system assembly comes to a weight of approx. 200 tons.
Downloads
Get even more information about our naval ship propellers
Everllence PrimeServ propeller maintenance concept
Our propeller maintenance concept (PMC) service packages are offered in connection with five- and/or ten-year inspections – in accordance with the standard docking periods and recommendation by the classification societies.
How you benefit:
- Prompt delivery of high-demand spare parts within 24 hours
- Fast, reliable and competent customer support
- Individually tailored O&M contracts
- Ongoing training and qualification of operators and maintenance staff
- Global service, 24 hours a day, 365 days a year
Deeper insights
.tmb-0.png?Culture=en&sfvrsn=b3e10e84_1)
