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The racing series folding propeller from Gori propeller is developed from our experience in supplying the world's leading yachtsmen, many of whom achieved firsts in Admiral's Cups, Whitbread Round The World Races and other major events.
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The racing series folding propeller from Gori propeller is developed from our experience in supplying the world's leading yachtsmen, many of whom achieved firsts in Admiral's Cups, Whitbread Round The World Races and other major events.
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The SOLAS Ski Propeller is designed with a revolutionary new blade geometry to handle a wide range of conditions, from family recreation to sporting and competitive events.
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By now everybody knows about the function of the folding blades propeller for sailing hulls is:
TO REDUCING THE PROPELLER DRAG DURING SAILING
(propeller drag is reduced about 90% compared to the traditional two fixed blades propeller).
The opening operation is automatic and is caused by the centrifugal force, increasing according to the engine revolution. In forward gear the pressure on the blades allows a performance equal to the fixed-blades propeller.
During this opening phase a quick acceleration of the engine is not advisable, and we recommend to make it
smoothly and gradually.
Even at low revolutions the centrifugal force is enough to opening the blades.
When the engine is off, a forward speed of 1 to 2 knots generates sufficient water pressure for the blades to close.
Reverse gear has always been the main problem for folding blades propellers.
Mainly due to the water pressure acting in opposition to the blades opening and the lack of a support point for the blades on the hub, only partially open, and the blades float, causing an unstable and insecure condition when maneuvering.
In order to avoid this inconvenience we studied and tested special blade sections that allow the blades to remain fully open during reverse operation with positive maneuvering results.
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This type of propulsion system is particularly suited
to working vessels (tow-boats, fishing boats, river
bargers and pusher tugs) in the sea and on
rivers.
The nozzles can be of two types: "Fixed" or "Rotating"
(Steering Nozzles).
The advantages gained are the following:
- Reduction of propeller diameter;
- Reduction of propeller shaft and stern tube diameter;
- Reduction in vibrations, expecially in the wider stern as the nozzle regulates the water flow; - Reduction in ship's pitching when in rough waters;
- Increase in the propeller thrust to the tow and to the Bollard-Pull;
- Possible increase of ship speed by approx. 15%;
- Better performance from heavily loaded propellers, especially in shallow water;
- At the same conditions of speed, trawler work, Bollard-Pull, need 30% less power engine;
- The smaller engine cost, the reduction of fuel consuption, the high-performance of trasmission allow to recover the investiment within one or two years.
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A propeller is possibly the most essential component of a motorboat and very important for sailing boats too. It requires a lot of attention, both by the naval architect and by the propeller manufacturer. "Specialists", who are able to tell you "off the cuff" what type of propeller your boat requires, simply do not exist. VETUS makes good use of an especially developed computer programme, which ensures the determination of the exactly right propeller for your boat with the aid of some (correct) information, which we require from you.
What are the most important demands made upon a propeller?
Balance
If you bear in mind that a propeller is often rotating at 2.000 r.p.m. (which is more than 30 revolutions per second!), you will appreciate that a good propeller should be well-balanced. A difficult and time-consuming job. but an absolute "must" nonetheless.
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THIS PROPELLER HAS BEEN DEVELOPED FOR THE RACERS. IT'S FOLDING BLADES JOIN PERFECTLY IN ORDER TO PRODUCE A MINIMUM DRAG. OUR PRODUCTION RANGE FITS THE MAJOR ENGINES USED BY THE RACERS. THIS PROPELLER IS DELIVERED FURNISHED WITH MOUNTING TOOLS.
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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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SURFACE PIERCING PROPELLER FOR FAST BOAT, APPLICATION FOR DRIVE FIXED OR TRIMMABLES SURFACE DRIVE AS SURFACE DRIVE SYSTEM (S.D.S.)
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CONTROLLABLE PITCH PROPELLER FOR WORK BOAT. THE PROPELLER PITCH IS CONTROLLED BY AN HYDRAULICE CYLINDER INCORPORATED IN THE TRANSMISSION SHAFT EITHER ON THE GEARBOX OUTPUT OR BETWEEN THE PROPELLER SHAFT AND INTERMEDIATE SHAFT.
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All Clements' high performance propellers are manufactured from high integrity castings and a full range of designs are available with a three, four or five blade configuration suitable for all types of semi and deep V planing hulls. Sizes range up to 1.2 metres in diameter, in accordance with ISO standard 484/2 and, if required, to meet the demands of classification society inspection.
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All Clements' high performance propellers are manufactured from high integrity castings and a full range of designs are available with a three, four or five blade configuration suitable for all types of semi and deep V planing hulls. Sizes range up to 1.2 metres in diameter, in accordance with ISO standard 484/2 and, if required, to meet the demands of classification society inspection.
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