Doen Waterjets - News
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WATERJETS FOR UNMANNED APPLICATION

February 2016 – The Unmanned Systems Technology magazine published an article on the ECA Group’s Inspector Mk2 Unmanned Surface Vessel (USV) in its 6th issue, Feb/March 2016, which provides invaluable insights into ECA’s choice of Doen waterjets for Mk2.

   

Building up its USV capabilities since 2008, ECA Group (France) delivered the first Inspector Mk2 USV to an unnamed customer in September 2015. The boat is a shallow draft rigid monohull, designed for endurance of more than 12hours at 10Knots, while having the ability to sprint at 35Knots+, survive in sea state 5 and keep station accurately at speeds between zero to 25Knots.

Inspector Mk2 USV (optionally manned) is designed to form the core platform for an array of modular onboard payloads to suit a wide variety of missions including coastal surveillance, mine countermeasures, rapid environmental assessment, support for special operations forces and firefighting.

A pair of Doen DJ100G waterjets were chosen to drive this vessel to meet the requirements for high-speed performance, superior maneuverability and excellent cruising fuel economy. The integrated gearbox of DJ100G, eliminates the need for a separate marine gear and allows a perfect match between the waterjet and the 292hp Steyr engine, as well as the other nominated alternative engine options for Inspector Mk2.

The 245mm diameter, high volume axial flow impeller provides great trust across the entire speed range of this USV and exceptional cavitation margin allowing unrestricted full power application that is an essential requirement for towing mine hunting probe at low speeds.

ECA Group required Doen to supply the waterjets with a tailored control interface to suit a third party autonomous control system. Customized DJ100G waterjets were designed for this customer, each waterjet has its own fully integrated hydraulic system providing necessary control input and feedback information required for the third party independent system to control waterjets’ steering and reverse in manned or unmanned (remote or autonomous) mode. The hydraulic pumps are jet mounted and driven off the main shaft.

Doen electronic control systems can also provide for direct CAN BUS interface to third party systems for USV applications. The flexible architecture of Doen’s control interface provides for direct communication of control commands such as bucket and steering as well as engine throttle and gear select. In addition, system status details can be communicated to the remote system for alarm and monitoring purposes.

 

PATROL BOATS WITH DJ170HP WATERJETS

December 2015 - Two separate Patrol Boats, each fitted with a pair of Doen DJ170HP waterjets were incidentally launched within a week in late December 2015, one in Kaohsiung (Taiwan) and the other in Nha Trang (Vietnam). Both vessels exceeded the contract speed performance expectations.

The Taiwanese vessel, a high-speed aluminium 14m monohull, is designed by eRICH Naval Architect & Yatch Design and built to CR Classification Society rule by Shing Sheng Fa shipyard. Power is provided by twin CAT 746kW diesel engines, which are coupled to the DOEN waterjets through ZF marine transmissions.

This vessel that is now in service by Kaossiung Police has demonstrated excellent performance (46Knots) and has proven to be an extremely cost-effective vessel to build and operate.

The Vietnamese high-speed fiberglass 18m monohull, commissioned by Vietnam Boarder Guard Force (Ministry Of Defence), was built locally and achieved 38Knots during the trial. Power is provided by twin Volvo D13 diesel engines, which are coupled to the DOEN DJ170HP waterjets through ZF325-1 gearbox.

The DJ170HP is a 17” (432mm) single stage compact high performance waterjet that uses Doen’s latest impeller technology to delivers mixed flow type, high speed performance, within an axial build. This approach combines the key benefits of excellent high-speed efficiency with superior cavitation margins and efficiency at lower speeds and cruise conditions. This waterjet model incorporates many innovative features that enhance its application into high-speed craft. The lightweight fabricated intake tunnel for instance enabled DOEN to accommodate the requirement for tailor-made intake design to suit the hull form for this particular vessel.

Steering is by conventional helm using a power assisted hydraulic steering system. An inboard cylinder is directly connected to the waterjets inboard steering tiller. This provides the vessels with exceptional and easy control at all speeds, especially for pursuit and high-speed maneuvers. A simple mechanical tie bar is used to connect the waterjets providing synchronized steering at all times.

The DJ170HP waterjets in both vessels were fitted with DOEN’s Rotary Servo Control (RSC), which is a proportional hydraulic control system providing simple and exact follow up control of the waterjets reverse buckets, by conventional lever. This system has fully integrated hydraulics with in-built cooling; bulkhead mounted reverse cylinders with all hydraulic connections inboard and protected from corrosion. Conventional control levers using push pull cables operate this system.

 

DOEN LAUNCHES ITS LATEST MODEL, DJ142

November 2015, Melbourne, Australia - Doen WaterJets is pleased to add the DJ142 to its current range of waterjet models. Following the successful launch of the DJ140HP using the most recent intake and impeller designs, it was timely to introduce this latest 14-inch waterjet model into the market

DJ142 transom mount waterjet perfectly meets DOEN’s key design criteria of high performance, reliability and simplicity of construction and maintenance. This axial flow waterjet delivers compact and efficient performance at speeds up to 45+ knots. Construction comprises Stainless Steel and heavy-duty powder coated Aluminium components protected with an anode anti-corrosion system.

The transom mounting and very low profile of the waterjet ensure minimal intrusion into valuable onboard space. This allows for very low profile swim platforms or additional deck area; and the low propulsion shaft height allows flatter trim for the boat.

The use of modular construction has allowed the DJ142 to be lightweight, compact and simple to maintain and repair while being a robust commercially rated waterjet. The heavy-duty propulsion shaft and bearings, and an upgraded reverse mechanism with two cylinders assist in providing long life and trouble-free operation. The design and construction allow the DJ142 to be easily configured to meet BV, DNV, Lloyds, Rina or other marine standards on customer specification.

Doen’s standard hydraulic rotary servo control (RSC) provides proportional, position sensing, and control of the reversing bucket by way of a 3” (75mm) stroke Morse 33C cable. For twin installations, DJ142 can also be configured with Doen’s fully integrated electronic control system, ECS200.

DJ142 is expected to be in strong demand within the more sophisticated commercial and military markets, typically twin installations in small workboats and patrol vessels up to 15 meter length, powered by inboard diesel engines up to 700hp.

Doen WaterJets is a market leader in design and manufacturing of axial flow waterjets with over 45 years experience in design and application engineering, together with significant investment in R&D and a policy of continuous product improvement placing Doen waterjets at the forefront of the industry.

DJ142 provides yet another testimonial to Doen WaterJets unrivalled capability in offering extremely high-performance waterjets to the marketplace with very competitive pricing.

 

Press Release - 17th August 2015

SEA-TEK (AS) SIGNS HEAD DISTRIBUTOR AGREEMENT WITH ”DOEN” WATERJETS

Doen Pacific is proud to announce the signing of an exclusive Distributor Agreement for Europe with Sea-Tek (AS) domiciled in Oslo, Norway. In turn, Sea-Tek will appoint agents in several European countries in the near future, selling and servicing waterjets under its umbrella.

Sea-Tek is a key supplier to the marine industry in Europe, who is currently supplying mechanical, electronic, and hydraulic systems for controlling propulsion systems. This specialized market niche enables Sea-Tek to offer turnkey propulsion packages, tailored to customer needs by supplying state of the art engine/waterjet packages fully engineered for installation into the vessel. A ”one stop shop” package supply for any waterjet application in Europe.

Doen Pacific, a leading designer and manufacturer of waterjet propulsion systems for the past 48 years, and is one of only five marine waterjet manufacturers in the world building waterjets to match engines to 4,000kW, with some 4,000plus applications on the water in more than 30 countries.

Stephan Jorgensen, Managing Director of Sea-Tek who has vast waterjet experience, commented that ”Waterjet propulsion offers many advantages over conventional propeller propulsion, such as ’plug & play’ installation, lower engine load factors, excellent safety, as well as the ability to operate in shallow waters without risk of damage. Waterjets are well suited to high speed applications and displacing vessels, with excellent manoeuvrability including an emergency stop system, together with station keeping and Dynamic Positioning features.”

As customer satisfaction and service are important to Sea-Tek, a stock of waterjets and spare parts will be housed in Oslo for availability and immediate delivery to customers throughout Europe. In this way, Sea-Tek will be able to offer complete turnkey maritime solutions simplifying installation, supply, support, service, and reducing delivery times.

”I am very confident this partnership is the right choice for both parties, and we look forward to a fresh face roll out of the Doen Waterjet product throughout Europe” said Doen Director, Mark Peters.

 

GREEN RIVER CRUISE POWERED BY DOEN WATERJETS

30th March 2015 Korea - Funded by a Korean government R&D program, this prototype vessel is built and commissioned to showcase the credentials of exploiting green technologies in day-to-day domestic marine transport applications; The boat is equipped with hydrogen fuel cells and is driven by electric motors, providing for zero emission operation of this river cruiser whilst also reducing the day to day running costs by 20%.

Power is provided by 25kW H2 fuel cells plus 300A battery bank that drive twin 45kW 3-phase electric motors, which are coupled to the DOEN DJ140HP waterjets through a simple 2.0:1 reduction gearbox. The DOEN 15-inch (380mm) diameter high volume axial flow impellers provide excellent low speed efficiency and cruise capability enabling long range at reduced energy consumption.

The DOEN balanced steering nozzle gives fast and precise response. These are controlled using a conventional manual hydraulic steering system. Inboard cylinders are mechanically connected to the waterjets inboard steering tiller. This provides the vessel with exceptional easy control in both high and low speeds. A simple mechanical tie bar is used to connect the waterjets providing synchronized steering at all times.

The DJ140HP waterjets are fitted with DOEN’s Jogstick Reverse System (JRS); an electro hydraulic control system that provides non-follow up jog lever control of the waterjets reverse buckets. An analogue indicator is used to show the reverse bucket position. This robust, simple and cost effective system remains very popular with operators in remote and rugged use environments. For this particular application, waterjets are supplied with a tailor-made DC powered hydraulic system that allows the JRS to operate when required without placing any continual parasitic load on the electric motors.

 

UNMANNED SURFACE VESSEL (USV) FROM BRITTON MARITIME SYSTEMS

10 February 2015, Sydney, Australia - Britton Maritime Systems won the contract to deliver several USVs to the Royal Australian Navy for autonomous mine counter measures (MCM) operations. The USV can be remotely operated, fully autonomously operated without operator intervention or operated as a manned platform. The control system provided by a third party, consists of a command link that provides extensive control features and a comprehensive array of situational awareness data back to the shore or ship based command & control centre.

The custom Mark Ellis aluminium monohull design provides a robust hull to withstand the rigours of operating inside a minefield for prolonged periods. The demanding main propulsion requirement specified a jet and main engine suited for long periods of medium speed multi influence minesweeping and high speed transit, both in USV and manned missions.

To meet the dual requirement of the high thrust for medium speed towing and high-speed performance a pair of Doen DJ120 jets, coupled via ZF transmissions, to Yanmar engines were specified. The 310mm diameter, high volume axial flow impellers provide exceptional cavitation performance allowing unrestricted full power application, for towing, at medium to low vessel speeds. Each DJ120 waterjet has its own fully integrated hydraulic system providing for third party independent control of the waterjet’s steering and reverse control by the unmanned (remote or autonomous) control system. The hydraulic pumps are directly driven from the gearbox PTO’s.

The Doen waterjets are supplied with a tailored control interface to suit the third party autonomous control system. This interface provides necessary control input and feedback information required for the control system to independently operate the waterjets.

Doen electronic control systems can also provide for direct CAN BUS interface to third party systems for USV applications. The flexible architecture of Doen’s control interface provides for direct communication of control commands such as bucket and steering as well as engine throttle and gear select. In addition, system status details can be communicated to the remote system for alarm and monitoring purposes.

USVs can be operated day and night, around the clock conducting a range of persistent missions such as Mine countermeasures with the added advantage of not endangering personnel. They offer significant savings over dedicated MCM vessels and helicopter towed systems.

 

THRUSTMASTER EXPANDS PRODUCT LINEUP TO INCLUDE WATERJETS 

FEBRUARY 05, 2014 - HOUSTON - Thrustmaster of Texas Inc., a leading thruster manufacturer, expanded their product lineup to include waterjets after acquiring the technology of DOEN Pacific on Wednesday.

DOEN, a leading designer and manufacturer of waterjet propulsion systems for the past 48 years, is one of five marine waterjet manufactures in the world building waterjets up to 4,000 kW. Each waterjet model excels in the harsh operating conditions of the commercial and military marine markets.

To meet the demands of large scale, commercial applications Thrustmaster plans to introduce two new models to the DOEN waterjet product lineup. The 400 / 450 series Thrustmaster DOEN waterjets will extend the power range from 100kW to 6,400kW.

DOEN brings forward outstanding levels of performance and reliability with all models designed and built to exceed the most stringent industry standards. Thrustmaster DOEN’s axial flow waterjets provide speeds up to 45 knots combined with exceptional low speed thrust and load carrying capability.

The manufacturing of the Thrustmaster DOEN waterjet product range in Houston, TX is a key element in this joint strategy. Thrustmaster’s 2009 investment of $40 million in to a 200,000 sq ft, dedicated propulsion manufacturing facility laid the ground work for the latest agreement between the two companies to produce large orders of waterjets.

As Joe Bekker, President of Thrustmaster, explained during the opening ceremony of the facility, “What you are looking at is a large plant to build large thrusters. We are in the thruster business and we mean to stay here in the thruster business for the long haul.”

The manufacturing facility is supported by Thrustmaster’s global sales and service network that includes Houston, Lafayette, Rotterdam, Singapore, Dubai, Brazil and India. Thrustmaster’s agreement with DOEN enables Thrustmaster waterjets to be sold in Europe, North America and South America.

The agreement was reached after a year of planning between DOEN’s Director Mark Peters, DOEN’s Director / Chief Engineer Timothy Udvary and Thrustmaster’s President Joe Bekker. For over 30 years, Thrustmaster has been providing heavy duty thru-hull azimuthing thrusters, deck-mounted propulsion units for barges, retractable thrusters, transverse tunnel thrusters, and the patented Portable Dynamic Positioning System to the offshore, and marine.

The entire product lineup is designed and manufactured inhouse by a complete engineering department for mechanical, hydraulic, and electrical design.

Thrustmaster DOEN waterjet lineup includes:

100 Series Waterjets are available in seven model sizes ranging from 100kW to 900kW to accommodate vessels from 6m up to 20m. Supported by simple mechanical and electronic control system options.

200 Series Waterjets are available in four model sizes ranging from 400kW to 2500kW to accommodate vessels from 15m up to 45m with stainless steel jets supported by a complete range of electronic controls with joystick docking.

300 Series Waterjets are available in two model sizes ranging from 1300kW to 4000kW to accommodate vessels from 30m up to 60m with stainless steel jets supported by a complete range of electronic controls with joystick docking.

NEW 400 Series Waterjets are available in two model sizes ranging from 100kW to 6,400kW to accommodate large vessels with a complete range of electronic controls with joystick docking.

http://www.thrustmaster.net/thrustmaster-expands-product-lineup-include-waterjets/

 

 

DOEN MARCHES INTO CHINA 

 

 

DOEN PACIFIC PTY. LTD. ENTERS INTO JOINT LICENCE AGREEMENT WITH CHINA SHIPBUILDING INDUSTRY CORPORATION (CSIC) AND ITS MEMBER, WUHAN MARINE MACHINERY PLANT CO. LTD. (WMMP) FOR MANUFACTURE OF DOEN WATERJETS IN CHINA.

Doen Pacific - Trade and Technical Press Release, 29 October, 2012.

Doen Pacific as one of only 5 marine waterjet manufacturers in the world matching engines to 4,000kW, and CSIC, one of the two largest shipbuilding conglomerates in China, together with its Member WMMP, have jointly signed a license agreement for the manufacture and sale of WMMP-DOEN Waterjets in China.

The signing ceremony took place on October 29, in Wuhan, China, and was attended by representatives of each company, headed by Mr. He Jiwu, Board Chairman and President - Wuhan Marine Machinery Plant; Mr. Wu Jing, Vice-Executive General Manager - China Shipbuilding & Offshore International Co. Ltd, as the Technology Import channel for CSIC; Mr. Mark Peters, Director - Doen Pacific Pty. Ltd; and Mr. Timothy Udvary, Director and Chief Engineer - Doen Pacific Pty. Ltd.

”China’s burgeoning growth in shipbuilding capacity during recent years has stimulated the rapid development of the marine diesel engine market, and in turn the requirement for waterjet propulsion. Doen Pacific are delighted to have formed this strategic partnership with CSIC and WMMP, and have every confidence this agreement will enhance Doen’s presence in this region, said Mr. Peters.

The local manufacturing of the Doen Waterjet range is a key element in this joint strategy, and with WMMP having state of the art manufacturing, testing, and workshop facilities in Wuhan makes them an ideal partner for Doen Pacific in targeting the Chinese waterjet market, and complements their existing propulsion products

”I am very confident this partnership is the right choice for both parties, and the CSIC Group looks forward to adding the Waterjet to the range of propulsion products currently manufactured by WMMP”, said Mr. He Jiwu.

Doen’s latest range of 13 waterjet models, covering 100kW to 4,000kW will be manufactured and branded WMMP-DOEN in China, and the Director’s decision to license it’s waterjet technology is a landmark decision.

The roll out of this Indigenous waterjet program in China will help negate the total reliance upon imported products. One thing is certain, as prices are reduced for waterjets the market will greatly expand.

Doen expects the first waterjets to be produced in the coming months.