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VULKAN Composite shafts are especially suited for drive systems requiring low mass and/or where there is a great distance between shaft bearings. VULKAN composite shafts are used successfully world wide for marine propulsion and power generation, where reducing weight and eliminating intermediate shaft bearings were of high priority. They are currently in service on board fast ferries, patrol boats, work boats, yachts and stationary machinery. VULKAN Composite shafts are made from a carbon fiber reinforced synthetic material using the latest manufacturing techniques. The carbon fibers are wound in individual layers which are arranged in a criss-cross fashion with a specific winding angle relative to each other. This allows for a shaft that can transmit torque in either direction and through careful design the winding angle can be varied according to the desired shaft characteristics i.e. torsional and bending stiffnesses. The VULKAN Composite shaft utilizes bonded metal flange connections at both ends for connecting to the flanges in the drive train.
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The Simplan seal is a mechanical seal for water-lubricated sterntubes for river vessels and seagoing vessels.
Simplan seals meet the highest standards set by the "Central Commission for Rhine Shipping" (European Waterways).
They are certified by Germanischer Lloyd, the American Bureau of Shipping, by Lloyds Register and by ClassNK (Nippon Kaiji Kyokai).
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The operational efficiency of a machine or plant is determined by, above all, the bearing quality at all rotating components. This applies in particular to the line-shafting of ship propulsion plants. The Simplex bearings were developed especially for this purpose as short, plain bearings. More than 21,000 have left our works to date.
Simplex bearings are characterized by a short shell length. Moreover, they can be precisely aligned to avoid edge loading. The running properties of the bearing metal have been optimized with a technically highly advanced bonding of bearing metal and shell. The vital lubrication of the bearing is safeguarded in the Simplex bearing at all times, even at low shaft speeds. Temperature sensing and monitoring systems are also supplied. Cooling systems are available for unfavourable operating conditions.
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Pressure applied, spring released disc brakes
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Description
The Wichita Metana Caliper brake is
available in either Spring applied /
Hydraulic release or Hydraulically
applied / Spring release options. It is
available in a single frame size although
special mounting to suit customers
requirements may be possible. The
brake is designed for medium to heavy
duty applications where high energy
stopping and holding duties are
required.
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The highly flexible RATO-DS coupling has been specially designed for use in installations requiring a high level of torsional flexibility and medium level of misalignment capacity. Supplementing the "all-round" RATO-S the RATO-DS has been developed to offer an application - orientated coupling design. Specially for rigidly mounted ship´s main propulsion. The 3 available stiffnesses enable a good tuning of the system with respect to both the transient and steady-state torsional vibration response. In the tradition of VULKAN couplings, a backlash free torque transmission is achieved. When required a torque limiting device can be fitted. The normal misalignments caused by foundation deflections, heat etc. can be adequately compensated for by the radial, axial and angular flexibility of the RATO-DS. Dynamic safety was the prime consideration in the design of the RATO-DS coupling. This is reflected in the element in the element shape - mechanical and thermal capacity and by using a friction loaded bolting arrangement. The large ventilation holes located in the couplings metal parts ensure that any heat generated in the coupling is effectively removed. The advantages of the compact dimensions together with the possibility of radial removal of the element leads to a weight efficient coupling assembly in the drive system.
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The highly-flexible RATO-S coupling is a torsionally flexible rubber coupling that compensates radial, axial and angular shaft displacements of the connected machinery. The torque is transmitted by elements loaded in shear. The different torsional stiffnesses and damping factors available provide the possibility to satisfactorily tune the torsional vibration behaviour of the drive system. The essential parts of the coupling are: the torsionally flexible part, the membrane part and the connecting parts. The torsionally flexible part consists of elements, which can be arranged in one row or more rows respectively, dependent on the coupling size and the stiffness level. The flexible elements are divided into several segments. Due to the element segments and in the case of multi-row couplings, a displaced arrangement of the segments gives a good ventilation and cooling of the elements. With certain sizes the segments have additional ventilation holes. The segmental construction also assures easy handling at installation.
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The VULASTIK-L coupling is a torsionally flexible rubber coupling, that compensates axial, angular and, to a certain degree, radial displacement of the connected machines. Four rubber qualities and silicone are available in order to tune the coupling to the various system requirements. VULASTIK-L couplings are available with one elastic element in standard design or with two elements acting in parallel in Dual design. The main parts of the VULASTIK-L coupling are hub and flanged casing, between these, the disc-shaped element is arranged. This disc element is connected by vulcanization at its inner radius, the outer radius is connected to the flanged casing by a "plug-in" toothing. This toothing provides the axial "plug-in" feature and compensation of shaft displacements. The permissible angular coupling displacement is 0.5°. The VULASTIK-L elements are made from heat-resistant rubber, the admissible ambient temperatures range from -45°C to +90°C. Alternative elements in silicone are available (ambient temperatures range from -45°C to +120°C). With respect to a long lifetime, however, consideration should be given to sufficiently large ventilation cross sections. This is very important when considering bellhousing.
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Complementary to the "all-round" RATO-S coupling the highly flexible RATO-R coupling has been specially designed for use in installations requiring a high level of torsional flexibility and misalignment capacity. Inherent features of the design include the high dynamic load capacity and good rotational dynamic properties due to the low rotating inertias. The area of application is primarily in high-speed main/PTO systems driven by a Diesel engine or electric motor. In the low to middle torque range where the handling and installation of a complete element is practibable the RATO-R coupling is an additional alternative. A good tuning of the systems´s torsional vibration characteristics is possible due to the variety of torsional stiffnesses and element configurations available. The radial, axial and angular flexibility of the RATO-R coupling, with the shortest possible installation length, enables good compensation of shaft misalignments due to the flexible mounting of the prime mover, foundation movements etc. to be achieved. The use of relatively soft annular membranes permits, in the event of an axial vibration excitation, an efficient isolation of the system-effectively protecting shaft bearings. By avoiding noise paths, direct metal to metal contact, the RATO-R has excellent noise-attenuation properties.
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The PROPFLEX S coupling has been designed and developed to be installed on board of pleasure crafts, where comfort of the passengers requires a high vibrations isolation degree. It has to be positioned between the gearbox and propeller shaft in order to reduce the vibrations and noise transmission coming from the shaft line itself. It can compensate axial, radial and lateral misalignments and thanks to its modular design can be supplied in different lengths and complete of spools and hubs to match with the most known gearboxes and propulsion systems. It is particulary suitable for all applications where a thrustblock is not foreseen on the shaft line. The PROPFLEX S coupling can transmit directly the propeller thrust to the thrustblock into the gearbox. As there is no direct contact between metal parts, the PROPFLEX S coupling is a noise isolating coupling. Thanks to its own design, the Propflex S coupling can be dismounted radially, without moving the connected machineries. Also available in steel and aluminium execution.
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The PROPFLEX N coupling has been designed and developed to be installed on board of pleasure crafts, where comfort of the passengers requires a high vibrations isolation degree. It has to be positioned between the gearbox and propeller shaft in order to reduce the vibrations and noise transmission coming from the shaft line itself. It can compensate axial, radial and lateral misalignments and thanks to its modular design can be supplied in different lengths and complete of spools and hubs to match with the most known gearboxes and propulsion systems. It is particulary suitable for all application where the propeller thrust is already absorbed by the propulsion system. As there is no direct contact between metal parts, the PROPFLEX N coupling is a noise isolating coupling. Thanks to its own design, the PROPFLEX N coupling can be dismounted radially, without moving the connected machineries. Also available in steel and aluminium execution.
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The shaft bracket helps to keep the propeller shaft securely aligned. It must be designed in a way that makes the propeller run with a proper supply of water. It also has to be machined in a way that secure that the bearing within the bracket are be correctly positioned. A faulty bracket may lead to severe water supply problems, especially for boats capable of high speeds. This may result in cavitation, reduced speed and noise.
We design and produce or obtain both cast standard bronze brackets and specially welded brackets made from different steel qualities or aluminum. Bracket parts are made on demand for jointing and adaption by the boat builder.
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FRANCE HELICES MANUFACTURES ALL TYPES OF BRACKETS. BECAUSE OF THE LARGE NUMBER OF ANGLES, FRANCE HELICES HAS DEVELOPED A WIDE RANGE OF PATTERNS WITH AN EXCLUSIVE MODIFICATION ANGLE SYSTEM IN ORDER TO ALLOW ANY ANGLE OF INCLINATION BEFORE CASTING. THE DESIGN HAS BEEN MADE TAKING IN CONSIDERATION THE FOLLOWING PARAMETERS : MINIMUM DRAG, MINIMUM WEIGHT, STANDARD N.A.C.A. PROFILE, AIR INDUCTING (OPTION), NON CAVITATING PROFILE, HUB SIZED ACCORDING TO PROPELLER HUBS TO AVOID HYDRODYNAMIC DISTURBANCES.
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Varifold Propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction 'unloads' the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
- Diameter 432mm to 813mm or 16" to 32"
- For engines rated to 350HP
- Available for shafts & saildrives
- Latest blade design incorporates high skew and cambered blades for smooth operation
- Pitch reduction at the tip to reduce pressure pulses on the hull
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Varifold Propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction 'unloads' the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
- Diameters up to 1,016 mm or 40"
- For engines rated to 750HP
- Designed for high power sailboats,
to minimise noise & vibration
- Incorporates the latest low noise
blade design
- High blade area minimises
cavitation and thrust breakdown
at full power giving improved
efficiency and speed
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Varifold folding propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction %u2018unloads%u2019 the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
So advanced is Varifolds design that a 4 blade version has successfully been fitted to a yacht with a 750hp engine, we believe that would have been an impossible task for any other folding propeller. Each Varifold, whatever its size, is built to the same extremely high specification from a nickel-aluminium-bronze alloy which guarantees great strength and high corrosion protection. Cruiser racing and racing yachts can now get the best of both worlds; a folding propeller that combines low drag when sailing, with efficient and quiet power when motoring. Oh, and by the way %u2013 Varifolds open in reverse, and not just sometimes!
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Varifold Propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction 'unloads' the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
- Diameter 432mm to 813mm or 16" to 32"
- For engines rated to 350HP
- Available for shafts & saildrives
- Latest blade design incorporates high skew and cambered blades for smooth operation
- Pitch reduction at the tip to reduce pressure pulses on the hull
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Varifold Propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction 'unloads' the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
- Diameters up to 1,016 mm or 40"
- For engines rated to 750HP
- Designed for high power sailboats,
to minimise noise & vibration
- Incorporates the latest low noise
blade design
- High blade area minimises
cavitation and thrust breakdown
at full power giving improved
efficiency and speed
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Varifold folding propellers have taken the market by storm. Regularly fitted by such notable yacht building names as Baltic, Swan, Wally, Moody and Oyster, the complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold is revolutionary in design and brings a revolution to the yachts they are fitted to. Radical reductions in noise and vibration and excellent performance under engine, both ahead and astern, are the result of the propellers unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction %u2018unloads%u2019 the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull. While some other folding propellers have a helical pitch shape, few have proper sections or pitch distribution. None, put all these requirements into a complete package, except Varifold.
So advanced is Varifolds design that a 4 blade version has successfully been fitted to a yacht with a 750hp engine, we believe that would have been an impossible task for any other folding propeller. Each Varifold, whatever its size, is built to the same extremely high specification from a nickel-aluminium-bronze alloy which guarantees great strength and high corrosion protection. Cruiser racing and racing yachts can now get the best of both worlds; a folding propeller that combines low drag when sailing, with efficient and quiet power when motoring. Oh, and by the way %u2013 Varifolds open in reverse, and not just sometimes!
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