EP1008514A1 - Ship propulsion - Google Patents

Ship propulsion Download PDF

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Publication number
EP1008514A1
EP1008514A1 EP99124176A EP99124176A EP1008514A1 EP 1008514 A1 EP1008514 A1 EP 1008514A1 EP 99124176 A EP99124176 A EP 99124176A EP 99124176 A EP99124176 A EP 99124176A EP 1008514 A1 EP1008514 A1 EP 1008514A1
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Prior art keywords
ship
propellers
propeller
drive shafts
stern
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EP99124176A
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German (de)
French (fr)
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Dirk Büchler
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers

Definitions

  • the invention relates to a ship propulsion with on in the hull or under propellers arranged at the stern of the ship.
  • the Voith-Schneider propeller In inland navigation, the Voith-Schneider propeller has proven itself as a ship propulsion system for push and towing vehicles (water tractors) because of the high maneuverability of the units. Since the propeller jet can be directed as desired due to the relatively simple concentric shift of the control point, the installation of a rudder in ship units with a Voith-Schneider drive is completely unnecessary and therefore no longer available. Furthermore, with the possibility of producing reliable Z-gears, propulsion systems have also become established, in which the propeller is attached to a pylon which can be rotated through 360 ° and is formed in a streamlined manner under the ship. These rudder propellers are used in one structural unit for both ship propulsion and ship control.
  • the latest state of the art in this area are the Azipod propellers, where instead of a mechanical drive of the propeller via a Z gear, the drive takes place via an electric motor mounted in front of the propeller and rotatable with it.
  • the traditional rudder is also omitted in this ship propulsion system with a propeller arranged within a rotatable pylon.
  • deflection of the propeller jet is only possible if the propeller rotates within a nozzle which can be pivoted about a vertical axis.
  • jet rudders have a better rudder effect than conventional rudders, it is not possible to dispense with the arrangement of two mechanically separate units - thrust drive and ship control.
  • the object of the invention is to provide a ship propulsion with or in the hull propellers located under the stern of the ship are arranged create, especially for pushers and barges, with which both an optimal Thrust for forward and reverse travel can be achieved as well Control movements of the ship object can be carried out.
  • the object is achieved in that the drive shafts fixed in the hull or under the ship's stern are arranged in pairs in the range from just above to just below the water surface, the construction waterline, and in that at the stern of the watercraft on the tail ends of the paired propeller shafts on the surface rotating propellers are mounted so that the turning circle of the so-called surface propellers is at least 30% above the water surface, and that the watercraft is equipped without an additional control element, such as a rudder.
  • two surface-adjusting propellers which are essentially adjacent to one another and rotate in the opposite direction during normal cruising are preferably provided at the stern of the watercraft.
  • control maneuvers is achieved according to the invention both by adjusting the propeller blades and by reversing the direction of rotation of one of the two propellers, so that the impeller effect of both surface-adjusting propellers is then brought into effect in the same direction.
  • the propeller shafts are each arranged in an angular range of 0 ° to 45 °, preferably 0 ° to 20 °, to the longitudinal axis of the ship in the horizontal plane in order to achieve a larger force vector in the direction of movement of the ship by superimposing the thrust and transverse force components .
  • the blades of the surface-adjusting propellers should be manufactured according to the invention from fiber composite materials in order to avoid these high propeller weights.
  • the prerequisite is a universal control option for the pitch, speed and direction of rotation of each propeller.
  • the cheapest way to do this is with a diesel-electric control concept.
  • the first two columns of FIG. 2 show the axially parallel arrangement of the propeller axles, in the third column a thrust-optimized variant which is slightly twisted out of the longitudinal axis of the ship.
  • the movement concept will be presented using the thrust-optimized variant.
  • a thrust component and a lateral force are formed. These two components can be changed by varying the incline and speed. In principle, this gives you the option of driving straight ahead with a propeller and also making slight turns / displacements.
  • the use of two propellers results in considerably more favorable control properties.
  • the propellers turn in the opposite direction.
  • the slope corresponds to one for the Performance implementation optimal point.
  • the lateral forces rise through the opposite direction of rotation.
  • the speed of the propeller or power conversion is on each propeller differently. With full power conversion, the propeller with the lower one Speed a higher slope. This significantly increases the lateral force. There is a rotation combined with an offset.
  • a propeller works with a thrust vector ahead and a direction of transverse force.
  • the other propeller works with rearward thrust vector and with one in same direction as the first propeller pointing shear force vector.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Gear Transmission (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Drive shafts run from just above the water to just below this at the stern of the ship or boat and have variable pitch propellers at their above-water surface ends so the propeller sweep circle lies 30% above water. This is reinforced by a ships rudder etc. The vari-pitch propellers can be switched to rotate against the normal travel and can be switched simultaneously for maneuvering. Propeller pitch and propeller or drive shaft speed can be adjusted to vary their degree of control. The drive shafts should be at 20 degrees to the ship axis in the horizontal plane and the vari-pitch propellers should be made of a fiber composite.

Description

Die Erfindung betrifft einen Schiffsantrieb mit auf fest im Schiffskörper oder unter dem Schiffsheck liegenden Antriebswellen angeordneten Propellern.The invention relates to a ship propulsion with on in the hull or under propellers arranged at the stern of the ship.

In der Binnenschiffahrt hat sich bei Schub- und Schleppfahrzeugen (Wassertrecker) der Voith-Schneider-Propeller als Schiffsantrieb wegen der damit erreichbaren hohen Manövrierfähigkeit der Einheiten bewährt. Da der Propellerstrahl durch die relativ einfache konzentrische Verschiebung des Steuerpunktes beliebig gerichtet werden kann, ist somit der Einbau eines Ruders bei Schiffseinheiten mit einem Voith-Schneider-Antrieb völlig überflüssig und deshalb ein solches nicht mehr vorhanden.
Weiterhin haben sich mit der Möglichkeit der Herstellung zuverlässiger Z-Getriebe auch Antriebsanlagen durchgesetzt, bei der die Schiffsschraube an einem um 360° drehbaren, stromlinienförmig ausgebildeten Pylon unter dem Schiff befestigt ist. Diese Ruderpropeller dienen in einer Baueinheit sowohl dem Schiffsantrieb als auch der Schiffssteuerung.
Den neuesten Stand auf diesem Gebiet stellen die Azipodpropeller dar, wo statt eines mechanischen Antriebs des Propellers über ein Z-Getriebe der Antrieb über einen vor dem Propeller gelagerten und mit ihm drehbaren E-Motor erfolgt. Bei diesem Schiffsantrieb mit innerhalb eines drehbaren Pylons angeordnetem Propeller entfällt natürlich auch das traditionelle Ruder.
Bei fest auf im Schiffskörper oder unter dem Schiffsheck liegenden Antriebswellen angeordneten Propellern ist eine Umlenkung des Propellerstrahles jedoch nur dann möglich, wenn der Propeller innerhalb einer um eine senkrechte Achse verschwenkbaren Düse rotiert. Diese sogenannten Düsenruder bringen zwar gegenüber herkömmlichen Rudern eine bessere Ruderwirkung, jedoch kann nicht auf die Anordnung zweier mechanisch getrennter Einheiten - Schubantrieb und Schiffssteuerung - verzichtet werden. In inland navigation, the Voith-Schneider propeller has proven itself as a ship propulsion system for push and towing vehicles (water tractors) because of the high maneuverability of the units. Since the propeller jet can be directed as desired due to the relatively simple concentric shift of the control point, the installation of a rudder in ship units with a Voith-Schneider drive is completely unnecessary and therefore no longer available.
Furthermore, with the possibility of producing reliable Z-gears, propulsion systems have also become established, in which the propeller is attached to a pylon which can be rotated through 360 ° and is formed in a streamlined manner under the ship. These rudder propellers are used in one structural unit for both ship propulsion and ship control.
The latest state of the art in this area are the Azipod propellers, where instead of a mechanical drive of the propeller via a Z gear, the drive takes place via an electric motor mounted in front of the propeller and rotatable with it. Of course, the traditional rudder is also omitted in this ship propulsion system with a propeller arranged within a rotatable pylon.
In the case of propellers which are arranged fixedly in the hull or under the stern of the ship, however, deflection of the propeller jet is only possible if the propeller rotates within a nozzle which can be pivoted about a vertical axis. Although these so-called jet rudders have a better rudder effect than conventional rudders, it is not possible to dispense with the arrangement of two mechanically separate units - thrust drive and ship control.

Aufgabe der Erfindung ist es, einen Schiffsantrieb mit fest auf im Schiffskörper oder unter dem Schiffsheck liegenden Antriebswellen angeordneten Propellern zu schaffen, insbesondere für Schub- und Binnenschiffe, mit dem sowohl eine optimale Schubkraft für die Vorwärts- und Rückwärtsfahrt erreicht werden kann als auch die Steuerbewegungen des Schiffsobjektes ausgeführt werden können.The object of the invention is to provide a ship propulsion with or in the hull propellers located under the stern of the ship are arranged create, especially for pushers and barges, with which both an optimal Thrust for forward and reverse travel can be achieved as well Control movements of the ship object can be carried out.

Erfindungsgemäß wird die Aufgabe dadurch erreicht, daß die fest im Schiffskörper oder unter dem Schiffsheck liegenden Antriebswellen paarweise im Bereich von knapp oberhalb bis knapp unterhalb der Wasseroberfläche, der Konstruktionswasserlinie, angeordnet werden und daß am Heck des Wasserfahrzeugs auf den Schwanzenden der paarweisen Propellerwellen an der Oberfläche drehende Verstellpropeller montiert werden, so daß der Drehkreis der sogenannten Oberflächen-Verstell-Propeller sich zumindest 30% oberhalb der Wasseroberfläche befindet, und daß das Wasserfahrzeug ohne ein zusätzliches Steuerorgan, z.B. ein Ruder, ausgerüstet wird.
Erfindungsgemäß werden vorzugsweise am Heck des Wasserfahrzeugs zwei im wesentlichen nebeneinander liegende und bei normaler Marschfahrt entgegengesetzt drehende Oberflächen-Verstell-Propeller vorgesehen.
Die Ausführung von Steuermanövern wird erfindungsgemäß sowohl durch die Verstellung der Propellerflügel als auch durch das Umsteuern der Drehrichtung eines der beiden Propeller erreicht, so daß dann der Schaufelradeffekt beider Oberflächen-Verstell-Propeller in gleicher Richtung zur Wirkung gebracht wird.
Erfindungsgemäß werden weiterhin die Propellerwellen jeweils in einem Winkelbereich von 0° bis 45°, vorzugsweise von 0° bis 20°, zur Schiffslängsachse in der horizontalen Ebene angeordnet, um durch Überlagerung der Schubkraft- und der Querkraftkomponenten einen größeren Kraftvektor in Bewegungsrichtung des Schiffes zu erreichen.
Da die relativ großen Propellerdurchmesser, die hohen Flügelzahlen und die großen Nabendurchmesser bei Propellern aus Bronze zu hohen Propellergewichten führen, sollten zur Vermeidung dieser hohen Propellergewichte die Flügel der Oberflächen-Verstell-Propeller erfindungsgemäß aus Faserverbundwerkstoffen gefertigt werden.According to the invention the object is achieved in that the drive shafts fixed in the hull or under the ship's stern are arranged in pairs in the range from just above to just below the water surface, the construction waterline, and in that at the stern of the watercraft on the tail ends of the paired propeller shafts on the surface rotating propellers are mounted so that the turning circle of the so-called surface propellers is at least 30% above the water surface, and that the watercraft is equipped without an additional control element, such as a rudder.
According to the invention, two surface-adjusting propellers which are essentially adjacent to one another and rotate in the opposite direction during normal cruising are preferably provided at the stern of the watercraft.
The execution of control maneuvers is achieved according to the invention both by adjusting the propeller blades and by reversing the direction of rotation of one of the two propellers, so that the impeller effect of both surface-adjusting propellers is then brought into effect in the same direction.
According to the invention, the propeller shafts are each arranged in an angular range of 0 ° to 45 °, preferably 0 ° to 20 °, to the longitudinal axis of the ship in the horizontal plane in order to achieve a larger force vector in the direction of movement of the ship by superimposing the thrust and transverse force components .
Since the relatively large propeller diameters, the large number of blades and the large hub diameters lead to high propeller weights in bronze propellers, the blades of the surface-adjusting propellers should be manufactured according to the invention from fiber composite materials in order to avoid these high propeller weights.

Nachstehend wird die Erfindung an dem Steuer- und Manövrierkonzept für ein Stromschubboot mit Oberflächenpropeller näher erläutert. Es zeigen:

Fig. 1:
Die Seitenansicht eines Schubbootes mit Anordnung von Oberflächen-Verstell-Propellern am Heck;
Fig. 1a:
Die stilisierte Darstellung eines Schubbootes mit Anordnung von Oberflächen-Verstell-Propellern am Heck;
Fig. 2:
Die Antriebs- und Bewegungsvektoren von Oberflächensystemen;
Fig. 3:
Vektoren bei Geradeausfahrt;
Fig. 4:
Vektoren bei normalem Drehkreis;
Fig. 5:
Vektoren bei Rückwärtsfahrt durch Drehrichtungsumkehr;
Fig. 6:
Vektoren bei Rückwärtsfahrt durch Steigungsänderung.
The invention is explained in more detail below on the control and maneuvering concept for a power push boat with surface propeller. Show it:
Fig. 1:
The side view of a push boat with arrangement of surface adjustment propellers at the stern;
Fig. 1a:
The stylized representation of a push boat with arrangement of surface-adjustable propellers at the stern;
Fig. 2:
The drive and motion vectors of surface systems;
Fig. 3:
Vectors when driving straight ahead;
Fig. 4:
Vectors with normal turning circle;
Fig. 5:
Vectors when reversing by reversing the direction of rotation;
Fig. 6:
Vectors when reversing due to change in slope.

Bei einer Anordnung der Oberflächenpropellern hinter dem Schiff ist die Verwendung von zusätzlichen Rudern nicht nötig, da eine Steuerung des Schiffes nur mit dem Propeller möglich ist. Die Besonderheit des oberflächendurchstoßenden Propellers ist, daß die Flügel nur mit der unteren Propellerkreisfläche ins Waser eintauchen und somit stets eine Querkraft am Propeller vorhanden ist. Diese Querkräfte des Propellers können zum Steuern ausgenutzt werden.
Durch die paarweise Kombination von zwei Oberflächen-Verstell-Propellern ist die Möglichkeit einer universellen Steuerung durch die in zwei Richtungen steuerbare Kraftvektoren Schub und Querkraft je Propeller gegeben.Erreicht wird dies durch die Kombination von Drehzahl/Richtung mit einer Steigungsverstellung. Entsprechend Fig. 2 lassen sich theoretisch damit alle Bewegungsformen auch ohne Ruder bzw. Bugstrahlruder in der horizontalen Ebene erreichen. Voraussetzung ist eine universelle Steuermöglichkeit von Steigung, Drehzahl und Drehrichtung jedes Propellers. Am günstigsten wird das durch ein dieselelektrisches Steuerkonzept verwirklicht.
In den ersten beiden Spalten der Fig. 2 ist die achsparallele Anordnung der Propellerachsen dargestellt, in der dritten Spalte eine schuboptimierte, leicht aus der Schiffslängsachse herausgedrehte Variante.
Im Weiteren soll das Bewegungskonzept anhand der schuboptimierten Variante vorgestellt weden. Beim Antrieb eines Propellers bildet sich eine Schubkomponente und eine Querkraft. Diese beiden Komponenten können durch Variation von Steigung und Drehzahl zueinander verändert werden. Prinzipiell ist damit die Möglichkeit gegeben, mit einem Propeller geradeaus zu fahren und auch leichte Drehungen/Versetzungen durchzuführen. Durch die Verwendung von zwei Propellern ergeben sich jedoch erheblich günstigere Steuereigenschaften.If the surface propellers are arranged behind the ship, the use of additional oars is not necessary, since control of the ship is only possible with the propeller. The peculiarity of the surface piercing propeller is that the wings only dip into the water with the lower propeller circle and thus there is always a lateral force on the propeller. These transverse forces of the propeller can be used for steering.
The combination of two surface-adjustable propellers in pairs enables universal control by means of the thrust and lateral force force vectors, which can be controlled in two directions, by combining the speed / direction with a pitch adjustment. According to FIG. 2, all forms of movement can theoretically be achieved even without an oar or bow thruster in the horizontal plane. The prerequisite is a universal control option for the pitch, speed and direction of rotation of each propeller. The cheapest way to do this is with a diesel-electric control concept.
The first two columns of FIG. 2 show the axially parallel arrangement of the propeller axles, in the third column a thrust-optimized variant which is slightly twisted out of the longitudinal axis of the ship.
Furthermore, the movement concept will be presented using the thrust-optimized variant. When driving a propeller, a thrust component and a lateral force are formed. These two components can be changed by varying the incline and speed. In principle, this gives you the option of driving straight ahead with a propeller and also making slight turns / displacements. However, the use of two propellers results in considerably more favorable control properties.

Die einzelnen Bewegungsformen werden dabei wie folgt erzielt:The individual forms of movement are achieved as follows:

Geradeausfahrt, Fig. 3:Straight ahead, Fig. 3:

Die Propeller drehen entgegengesetzt. Die Steigung entspricht einem für die Leistungsumsetzung optimalen Punkt. Die Querkräfte heben sich durch die entgegengesetzte Drehrichtung auf.The propellers turn in the opposite direction. The slope corresponds to one for the Performance implementation optimal point. The lateral forces rise through the opposite direction of rotation.

Leichte Kurvenfahrt, Fig. 4:Easy cornering, Fig. 4:

Die Drehzahl der Propeller oder Leistungsumsetzung ist an jedem Propeller unterschiedlich. Bei voller Leistungsumsetzung hat der Propeller mit der geringeren Drehzahl eine höhere Steigung. Dadurch wird die Querkraft wesentlich vergrößert. Es erfolgt eine Drehung, kombiniert mit einem Versatz.The speed of the propeller or power conversion is on each propeller differently. With full power conversion, the propeller with the lower one Speed a higher slope. This significantly increases the lateral force. There is a rotation combined with an offset.

Extreme Kurvenfahrt:Extreme cornering:

Es arbeitet nur ein Propeller oder beide Propeller haben die gleiche Drehrichtung bei gleicher Steigungsrichtung. Only one propeller is working or both propellers are rotating in the same direction same slope direction.

Versetzen:Offset:

Ein Propeller arbeitet mit Schubvektor voraus und einer Querkraftrichtung. Der andere Propeller arbeitet mit rückwärtsgerichtetem Schubvektor und mit einem in die gleiche Richtung wie der erste Propeller weisenden Querkraftvektor.A propeller works with a thrust vector ahead and a direction of transverse force. The other propeller works with rearward thrust vector and with one in same direction as the first propeller pointing shear force vector.

Rückwärtsfahrt, Fig. 6:Reverse drive, Fig. 6:

Beide Propeller arbeiten mit entgegengesetzter Drehrichtung gleicher Steigungseinstellung und rückwärtsgerichtetem Schubvektor.Both propellers work with the same direction of rotation Incline adjustment and rearward thrust vector.

Claims (4)

Schiffsantrieb mit auf fest im Schiffsköper oder unter dem Schiffsheck liegenden Antriebswellen angeordneten Propellern, dadurch gekennzeichnet, daß die Antriebswellen paarweise im Bereich von knapp oberhalb bis knapp unterhalb der Wasseroberfläche, der Konstruktionswasserlinie, am Heck eines Schiffs- bzw. Bootskörpers gelagert sind und daß auf den Schwanzenden der Antriebswellen an der Oberfläche drehende Verstellpropeller montiert sind, so daß der Drehkreis der sogenannten Oberflächen-Verstell-Propeller zumindest 30% oberhalb der Wasseroberfläche angeordnet ist und daß der Schiffs- bzw. Bootskörper ohne ein zusätzliches Steuerorgan, z.B. ein Ruder, ausgerüstet ist.Ship propulsion system with propellers arranged fixedly in the ship's hull or under the ship's stern, characterized in that the drive shafts are mounted in pairs in the range from just above to just below the water surface, the construction water line, at the stern of a ship or boat hull, and that on the Tail propellers of the drive shafts are mounted on the surface of rotating propellers, so that the turning circle of the so-called surface propellers is arranged at least 30% above the water surface and that the ship's or boat's body is equipped without an additional control element, such as a rudder. Schiffsantrieb nach Anspruch 1, dadurch gekennzeichnet, daß die paarweise angeordneten Oberflächen-Verstell-Propeller für die normale Marschfahrt entgegengesetzt drehend schaltbar sind und für Steuermanöver gleichsinnig drehend schaltbar sind und daß das Maß der Steuerbewegung durch Veränderungen von Steigung der Propellerflügel und der Drehzahl der Propeller- bzw. Antriebswellen einstellbar ist.Ship propulsion system according to claim 1, characterized in that the surface-adjusting propellers arranged in pairs can be switched in the opposite direction for normal cruising and can be switched in the same direction for control maneuvers, and in that the degree of control movement is caused by changes in the pitch of the propeller blades and the speed of the propeller. or drive shafts is adjustable. Schiffsantrieb nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Antriebswellen jeweils in einem Winkelbereich von 0° bis 45°, vorzugsweise von 0° bis 20°, zur Schiffslängsachse in der horizontalen Ebene angeordnet sind.Ship propulsion system according to Claims 1 and 2, characterized in that the drive shafts are each arranged in an angular range from 0 ° to 45 °, preferably from 0 ° to 20 °, to the longitudinal axis of the ship in the horizontal plane. Schiffsantrieb nach Anspruch 1, 2 und 3, dadurch gekennzeichnet, daß die Flügel der Oberflächen-Verstell-Propeller aus Faserverbundwerkstoffen gefertigt sind.Ship propulsion system according to claim 1, 2 and 3, characterized in that the blades of the surface-adjusting propellers are made of fiber composite materials.
EP99124176A 1998-12-07 1999-12-03 Ship propulsion Withdrawn EP1008514A1 (en)

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DE19856305 1998-12-07
DE1998156305 DE19856305A1 (en) 1998-12-07 1998-12-07 Ship propulsion

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WO2005044659A1 (en) * 2003-10-28 2005-05-19 Aimbridge Pty Ltd Control method and control system for a controllable pitch marine propeller
EP1900632A1 (en) 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
EP1900633A1 (en) 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
EP1900631A1 (en) * 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
EP1900634A1 (en) 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
EP1900630A1 (en) 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
EP1900636A1 (en) 2006-09-15 2008-03-19 Yellowfin Limited Marine propulsion and constructional details thereof
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DE10352971B4 (en) * 2003-11-13 2008-09-11 Markert, Matthias, Prof. Dr.-Ing. Control device for marine propulsion systems with surface-cutting double-pitch propellers
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EP4309996A1 (en) * 2022-07-22 2024-01-24 JOST Group GmbH & Co KG Electric propulsion and steering system for a watercraft

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WO2003006313A1 (en) * 2001-07-13 2003-01-23 Dorchester Maritime Limited A method of disposing of gas and propulsion apparatus for a ship
WO2005044659A1 (en) * 2003-10-28 2005-05-19 Aimbridge Pty Ltd Control method and control system for a controllable pitch marine propeller
US7473076B2 (en) 2003-10-28 2009-01-06 Aimbridge Pty Ltd. Control method and control system for a controllable pitch marine propeller
WO2008032119A1 (en) 2006-09-15 2008-03-20 Yellowfin Limited Marine propulsion and constructional details thereof
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WO2009126090A1 (en) * 2008-04-08 2009-10-15 Rolls-Royce Aktiebolag A method of providing a ship with a large diameter screw propeller and a ship having a large diameter screw propeller
CN102056793A (en) * 2008-04-08 2011-05-11 罗尔斯-罗伊斯股份公司 A method of providing a ship with a large diameter screw propeller and a ship having a large diameter screw propeller

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